Unfortunately it's really difficult to quantity how medication is going to affect you, as it's different for everyone. I have had really good results with Cyproterone for an AA, and I switched from patches to pills about 2 years into HRT because I was forgetting to change them.
Progesterone has unclear effects, so it's hard to say you started it "too early". I don't think there's harm in starting earlier, but there's not much research into it so it's hard to say.
Breast growth can last up to 5 years, but you may want to manage your expectations around it. Breasts come in all shapes and sizes, and yours isn't 'wrong'. Everyone is different - for me, they are quite shallow and learning to love my body has been a really difficult journey.
Yeah, I agree. For me (a trans woman) it'd make me slightly uncomfortable if somebody capitalised my pronouns each time because I'd feel like some type of power dynamic that's not comfortable for me to sit in. If that's not an issue for OP, that's okay, but with my specific cultural background i'd find it a bit difficult to interact with Them in that way (not that it's hard for me to respect Their pronouns, just that it's slightly uncomfortable in a power dynamic way)