Hi Jamie. Clothes are tough! I often find it hard to get clothes that fit me too. I've thought about buying patterns and just making my own clothes sometimes. I'd need more motivation to do that though
While I can't relate directly to your experience of gender (I always feel male but was assigned female), I have definitely heard others who share a similar story to you. Sometimes they may identify with being gender fluid, agender, non-binary or something else. Some people just don't even want a label and say "I'm just me!" which I get as well. You're definitely not alone though Do what feels best to you.