I've been really uncomfortable in my own skin lately

I don't hate myself or anything like that. But lately I've been really uncomfortable with how I look and I can't figure out why it started or when. I see other people who just seem so at ease with themselves and I don't know how to feel that way. I've started avoiding certain situations because of it and I think it's holding me back more than I want to admit. I started thinking about where this feeling was actually coming from. How much of it was genuinely about how I look versus how much was coming from comparing myself to people online and around me. I also looked at the specific situations I'd been avoiding and what I was actually afraid would happen if I showed up anyway. I realized that the avoiding was making it worse not better. Every time I skipped something because of how I was feeling about myself it just reinforced the idea that I had something to hide. I was making myself smaller to feel safer but it wasn't actually making me feel better. I decided to try showing up to one thing I'd normally avoid and just see what happened. Not to feel confident, just to stop letting the feeling make decisions for me. I also started paying attention to when the feeling was loudest and noticed it was almost always after being on my phone for a long time.