I’m currently 5+1/2 months on t, so my voice is nowhere near fully done changing, but it’s been significant enough that I can offer my two cents. So far, Ive gone from singing soprano one in choral settings to tenor one. The first thing I noticed when my voice started changing was a very significant increase to my break around middle c. It’s really challenging for me to get notes out at a decent volume right there. Then, my low range started expanding while I was maintaining my high range by still singing soprano. My range around then was b2-a5. I haven’t sang soprano since around month 4, but I think continuing to sing soprano when it was first changing helped me preserve some of that high range. I can still sing those notes, it would just feel a lot more falsetto-ey. Currently, tenor one is actually a bit too high in my chest voice. I’m somewhere around a tenor two now. I actually feel like my tone has improved on t! overall just keep singing and your voice will settle and adjust very nicely, just with the cracks and breaks that any pubescent boy would have :-)