What a world to figure out and make sense of. Sounds like you're doing the best you can to navigate this world.
I like how you posted Bryan's fan art and your fun ads. Engaging on the page with recommendations, writing tips, posting some of your AI art, etc seems like it could generate more attention. I know this is especially true for Instagram. Personally, I know I'm more likely to follow and explore someone's page if it's not just book promotions but interesting articles or resources too.
RE: AI Art in a Facebook Ad