Hi again Xirafel,
I remember that before my puberty, I used to sing a lot, even started professionaly with my teacher and sang on some rare occassions..Anyway, as puberty hit me and my voice began to jump, I got scared and felt ashamed of it. I tried to maintain what nature wanted to change and failed- or at least I thought so.
You mentioned you used to sing... And that's good, because...
I recently tried to find my feminine voice and guess what happened- it was like my body remembered I tried to maintain my pre-pubertal voice. It's much easier! (or at least I think it is). Most people need some training, voice teacher and a lot of time to be able to hit that pitch, resonance and melody. I did it in a week of intense "try and fail". And now, I'm even able to speak with my feminine voice, for about 5 minutes. Most of the time, I can switch from male to female in a second and I'm sure, once I don't need my male side, I'd be able to speak like a proper girl

All this because I didn't give in so easily during puberty. I tried different things, I played with my voice, pushing it higher and higher to the point where I thought the nature won and I'll have to keep that awful gringe forever.
All I'm trying to say is that chances are, if you used to sing before puberty and played with your voice like I did, you will be fine. No voice surgeries needed with much less effort.
My only wish (so far not met) is that I could sing with a girly voice. Maybe once I come out of the closet.