I guess mostly just jokes or if i post my thoughts or things about my life I try to present it in a humorous way so it's not so boring, like you said. Though I have tons of mutuals who just post mundane stuff like "eating oatmeal" and still get likes lol. Posting makes me anxious sometimes too and I delete stuff if I feel ignored or embarrassed, but unless you're like a porn blog being creepy under people's posts I don't see why anyone would make fun of you unprovoked.>>And then when I do see people blog post on twitter/tumblr they already have a lot of followers and a group of people who interact with their every post which I obviously don't have
Nona that's not hard to get at all! ^^ If you follow people you share similar interests with and reblog/post about that, I don't see why they wouldn't follow you back. I think posting your art is a great start, do you post fanart too? Imo thats a good way to make your art and blog gain some traction if you put it in the fandoms tags.
Don't worry, It took me a while to get followers and make friends too. And maybe I was lucky that they dmed me first, but if you wanna befriend someone and feel too shy to interact directly you could try sending her an anon ask! Not everyone online has a huge friend group, a ton of people are lonely and want to make friends too<3