I have very positive self image.

just kind of socialize and get involved in stuff without as many second thoughts

Yes, this is easy for me. It's still tiring, but I don't worry about it before or afterwards. I still get embarrassed if I make a faux pas, of course, but I move on and try to learn from it.

make and share stuff with less... uncomfortable being associated with your work

Not sure I understood this part. If I was uncomfortable with what I made, I wouldn't share it. I'd try again until I had something worthwhile. Not perfect, but at least interesting.

As I understand it, "imposter syndrome" is a feeling like one is uniquely unqualified compared to everyone else. But the reality is that most people are more-or-less bullshitting their way through life, outside of a half-dozen areas of actual competency. The reality is also that it's okay to still be learning something you're trying to do. And the reality is also that no one remembers your mistakes better than you.

Everyone is most comfortable doing things we're already good at. But it's okay to not be comfortable, and to not be good at something, as long as the stakes aren't too high (like, you should be good at driving before taking the wheel of a busfull of schoolchildren, obviously).

Oh, and remember that most people are amoral idiots with no sense of beauty and their opinions aren't worth shit. If they don't like your stuff, so what? They know nothing. The people worth impressing are the ones most likely to be understanding and compassionate, because they're the ones who struggled and strove and valued learning themselves.