Welcome! As Mariah said, we do have a nonbinary subforum here.
I'm kinda-sorta in the same boat as you, being a nonbinary AFAB student. While I don't plan on medically transitioning, I am getting a binder soon, and I also plan on expanding my wardrobe to include men's clothing in addition to the women's clothing and gender-neutral clothing I own.
Have you looked into voice-deepening exercises at all? I've heard there are vocal exercises you can do to deepen your voice to an extent pre-HRT and pre-op.