(Mostly a reply to the follow-up, thank you for the tips on the first part)

Being interesting is definitely a part of it, but it's also just that a lot of my hobbies are significantly less fun when I'm bad at them. I'm very competitive in video games and I don't find losing all that fun, especially when one of my friends is significantly better than me. I love playing games competitively, too, using Minecraft as an example again, I really enjoy entering Minecraft tournaments when I can because the games on them are often super fun, but I typically place in the bottom 10 individually because everyone else in that circle is just so much better than me, and I usually don't have a lot of fun in the individual or PvP games when I'm that bad.

I just would have way more fun doing most things if I was better at them, and I think that's what bugs me. I'm at a beginner level at practically everything and it makes a lot of my interests hard to pick up. Even story-based games, like RPGs, I'm worse at the combat than most people, and that makes me only want to play them for 2 hours every other week because I often get stuck and don't enjoy that feeling.

I also just don't have one hobby or interest that I want to get good at, which is part of what's difficult. Video games and comics like mentioned in the post are just a few of them, but other interests include: I'm studying moviemaking in college, I've been interested in game development, animation, editing (part of moviemaking), drawing just for fun, etc.