Hi cinnamonsun
You are already recognising the need to set boundaries on social media, which is good. Too many people just think "oh great, all these people want to be friends with me". No, they don't!
There are exceptions who are genuine. I'm on a few hobby-related sites (not art) and here's an example. One site I write a weekly blog, never had a problem with any of the members, except two who at the start were being a bit chauvinistic (all sorted quickly, lol). The other is different. Same hobby but don't like it so use as info source. Members openly criticising each other. One even direct messaged me on one subject in an attempt to get me on his side with his non-hobby related views. Not heard anything more from him as replied I wasn't interested in politics, thoughts on Covid, etc.
Hope my examples help you. I'll only become friends with people I know or pass my honesty test. Soon sorts out those who are genuine. Of course, one or two may slip through the net. Social media is very good most of the time, but when it goes wrong, consequences can be difficult to undo. Only you can control what you want to be part of.
Good luck with sorting out your Facebook account. Unfortunately, I don't have enough experience to advise you.