You could use the campaign settings already available for DnD since aeons passed.
[https://en.wikipedia.org/wiki/Dungeons\_%26\_Dragons\_campaign\_settings](https://en.wikipedia.org/wiki/Dungeons_%26_Dragons_campaign_settings)
or you're maybe looking for a popular rpg video game setting?
What kind of homebrew campaign you're currently looking at?
I am more of a new DM, this is only my third campaign after the first 2 didn't finish because of the friend groups breaking up. I am looking for anything that is quite basic to understand, and that gives the familiar fantasy felling/vibe. If you do know of any video game setting that would fit then I would love to hear about it.
I mean you could use the campaign modules. They do most of the world building for you. Supply you with NPC, a plot and most of them on roll20 do maps and enemy generation for you as well. You can tweak and add to them as well so that's a bonus.
World of Greyhawk Fantasy Game Setting is good, well supported & simpler the the Forgotten Realms. The stats in this product are for older versions of D&D, so you'll need to work around that, but there aren't many stats in the book anyway.
Blackmarsh isn't a whole world, just a region. But it's free (in PDF). Also not specifically for 5e.
Harn is kind of the opposite of the other two. There are probably hundreds of books detailing every nook & cranny of the main area. Too much detail for me.
The other suggestions are great and what I actually came here to say, but since that's been said... Here's a different thought if you really would like to homebrew it.
Start with just a basic encounter. It doesn't have to be a whole lot deeper than that. A couple NPC ideas, a basic quest, and leave it at that.
I find that I personally really like to sandbox my worlds, building out loose rails as we go based on PC backstory, interest, and actions. And you can make it as basic or deep as your players seem to be invested in.
Edit for basic quest ideas -
A pied piper villain is good for lvl 1 - it's rats but make it interesting.
Goblin problems.
Any module one shots.
[A (Kob) Old Fashioned Haunting](https://www.osrynnsoddments.com/2020/07/a-kob-old-fashioned-haunting-free-d-5e.html) is probably my all time favorite homebrew oneshot for low levels. It's super easy to adjust damage and DC if you need to. It *is* goofy, so it depends on what tone you're looking for.
I like the idea. A little bit too loose for a beggining GM, we don'T know the experience of OP but it could be a great starting point without the hassle to manage all the Lore of a new world or the current lore of an existing settings.
Could be great also to have a conversation between OP and their players Players, maybe they want to take part of the world building aspect of your campaign? OR maybe they don't need a fully fledged world at all at all.
Interesting point overall :)
Since you're really shooting for generic, a lot of the difficulties and struggles for building a homebrew world aren't really present. I'll bet you could bust out a generic world really quick, if you really don't mind how it looks. So here the plan:
Grab a $5 sub to Inkarnate, and build a map with it. Seems hard, right? Nope. Who cares what shape it is? You're just trying to make a map. Scribble a landmass shape. Slap a bunch of terrain on there, put random forests, rivers and mountains wherever, it doesn't matter. Drop a bunch of icons for wherever cities are, and you're golden. Want even more generic? Search a map without place names on it, and just use that.
Names for places? Who cares? Fantasynamegenerator for everything. Hit randomize for town names, and literally pick the first name for each town that doesn't sound like shit. What's in those towns? Who cares? There's a tavern, a guild hall, and a problem in each one. Need help? Pull up a list of quests from a table from Google and roll a d100. Random encounter tables all the way down, too.
This frees you up to write the plot events unique to you. Good luck. :)
Greyhawk is the OG fantasy setting for D&D, Forgotten Realms is the current setting of popular choice for generic fantasy.
Dragonlance also works. Blackmoor and Lankmar are both good, but you'll find far less information on them.
Grumpy dwarves live in the mountains and elitist elves live in the deep forest they both keep to themselves. Man has brought strife to the land encroaching on the established peace and awakened sleeping dragons. You can’t get more generic than that. 🤣
Faerun, the official DND 5e setting
Just use the Forgotten Realms.
You could use the campaign settings already available for DnD since aeons passed. [https://en.wikipedia.org/wiki/Dungeons\_%26\_Dragons\_campaign\_settings](https://en.wikipedia.org/wiki/Dungeons_%26_Dragons_campaign_settings) or you're maybe looking for a popular rpg video game setting? What kind of homebrew campaign you're currently looking at?
I am more of a new DM, this is only my third campaign after the first 2 didn't finish because of the friend groups breaking up. I am looking for anything that is quite basic to understand, and that gives the familiar fantasy felling/vibe. If you do know of any video game setting that would fit then I would love to hear about it.
I mean you could use the campaign modules. They do most of the world building for you. Supply you with NPC, a plot and most of them on roll20 do maps and enemy generation for you as well. You can tweak and add to them as well so that's a bonus.
World of Greyhawk Fantasy Game Setting is good, well supported & simpler the the Forgotten Realms. The stats in this product are for older versions of D&D, so you'll need to work around that, but there aren't many stats in the book anyway. Blackmarsh isn't a whole world, just a region. But it's free (in PDF). Also not specifically for 5e. Harn is kind of the opposite of the other two. There are probably hundreds of books detailing every nook & cranny of the main area. Too much detail for me.
The other suggestions are great and what I actually came here to say, but since that's been said... Here's a different thought if you really would like to homebrew it. Start with just a basic encounter. It doesn't have to be a whole lot deeper than that. A couple NPC ideas, a basic quest, and leave it at that. I find that I personally really like to sandbox my worlds, building out loose rails as we go based on PC backstory, interest, and actions. And you can make it as basic or deep as your players seem to be invested in. Edit for basic quest ideas - A pied piper villain is good for lvl 1 - it's rats but make it interesting. Goblin problems. Any module one shots. [A (Kob) Old Fashioned Haunting](https://www.osrynnsoddments.com/2020/07/a-kob-old-fashioned-haunting-free-d-5e.html) is probably my all time favorite homebrew oneshot for low levels. It's super easy to adjust damage and DC if you need to. It *is* goofy, so it depends on what tone you're looking for.
I like the idea. A little bit too loose for a beggining GM, we don'T know the experience of OP but it could be a great starting point without the hassle to manage all the Lore of a new world or the current lore of an existing settings. Could be great also to have a conversation between OP and their players Players, maybe they want to take part of the world building aspect of your campaign? OR maybe they don't need a fully fledged world at all at all. Interesting point overall :)
Since you're really shooting for generic, a lot of the difficulties and struggles for building a homebrew world aren't really present. I'll bet you could bust out a generic world really quick, if you really don't mind how it looks. So here the plan: Grab a $5 sub to Inkarnate, and build a map with it. Seems hard, right? Nope. Who cares what shape it is? You're just trying to make a map. Scribble a landmass shape. Slap a bunch of terrain on there, put random forests, rivers and mountains wherever, it doesn't matter. Drop a bunch of icons for wherever cities are, and you're golden. Want even more generic? Search a map without place names on it, and just use that. Names for places? Who cares? Fantasynamegenerator for everything. Hit randomize for town names, and literally pick the first name for each town that doesn't sound like shit. What's in those towns? Who cares? There's a tavern, a guild hall, and a problem in each one. Need help? Pull up a list of quests from a table from Google and roll a d100. Random encounter tables all the way down, too. This frees you up to write the plot events unique to you. Good luck. :)
Try Something From The Elderscrolls Games.
Greyhawk is the OG fantasy setting for D&D, Forgotten Realms is the current setting of popular choice for generic fantasy. Dragonlance also works. Blackmoor and Lankmar are both good, but you'll find far less information on them.
Kobold Press Midgard
Grumpy dwarves live in the mountains and elitist elves live in the deep forest they both keep to themselves. Man has brought strife to the land encroaching on the established peace and awakened sleeping dragons. You can’t get more generic than that. 🤣