So today has been a very windy emotional roller coaster. My binder arrived on my doorstep today; though I wasn't worried about anyone asking questions, it just so happened that it came when I was home and no one else was, which was pretty lucky. The thing fits great and makes me flat as a board (or as flat as male humans should be, anyways), which is honestly incredible because I'm a pretty big-chested dude. I'm wearing it right now to get used to it and I've never felt happier with my body.
Then I came out to my mom. She was extremely understanding and accepting, though she cautioned me not to rush into things--I think she thinks I'm confused. She's all for free gender expression and won't mind me binding or wearing my hair short, but she's apprehensive about using different pronouns. Not thrilled about the latter, but baby steps. When I'm living independently for a while it'll probably be easier for her to accept.
Getting my hair shorn tomorrow, then testing the waters of being referred to with he/him pronouns within my peer group. Life's pretty neat.