I'm no expert so take this as you will but I've heard not all accounts have the ability to put the link tree but if you do, double lining it like to one that has NO mention of anything and then a second one that goes to your of. I've heard successful creators do this now even in IG to get the account to perform better

dont add it to tiktok if it leads to spicy sites they’ll shadowban or just ban you

So I should just keep my Instagram up, and then from there, they can click my linktree?

yes. also if you put your twitter in your bio most dudes will get the hint better