Personally, I'm not super into social media, so I'm not on a whole lot. But I have found that Cara is super nice and chill, as it is just for artists and portfolio sharing. Makes it a special community, and feels more intimate socially as far as the internet goes. lol
Cara lets you do a shout out to the whole site, so anyone can ask questions or share things to involve others in, and then that's up for grabs to Cara's community. I found that to be rather engaging with people. They also try and get people follows by sharing those who are just starting on the site, or who are under 100 follows.
I would suggest BlueSky, but I don't like it at all. lol But some enjoy using it!
Discord has a lot of art communities too, if you're interested in that kind of thing. :}