I haven't practiced my voice very much. I bought a DVD and I did a little with it, but with all the other stresses coming from transition, it got to the point where even thinking about sitting down for an hour to practice would make me want to bang my head on the coffetable.
So I figured I would get by with the girl's voice I had for the time being... until some of the other headaches eased off (like ELECTROLYSIS!!! and the name change), & then I could concentrate more on the voice.
I've found just the simple act of living as a girl has done a lot for my voice. Obviously I make a serious effort whenever I talk to someone I don't know, & it's usually passable. Whenever I spend lots of time with people who never knew me as a guy, it gets a lot better, until I get around a group that knows my status and then I get lazy. I'm going on the road with a band next weekend for 5 days, and I've never met a bunch of the guys, so I'm looking forward to how comfortable I'll be with my voice by the end of the tour.
It's a process, just like everything else. Practice will help, but don't think you're going to sit in a practice room for a month and come out sounding like you will eventually. From living as Amy for 5 months, my natural speaking voice has changed a lot. I called an old friend the other night and he didn't know who it was. Everyone tells me my voice is very different. It's not necessarily naturally girly yet, but it's different. I can see how with just a little more practice, and more time living as a girl, how your voice changes on it's own. I really can't sound like I used to, even if I try (not that I'd want to!).
So for those of you just starting your transition, remember that everything happens slowly, over time. Your body doesn't change overnight. Hair doesn't grow overnight. Mannerisms take time to become natural. And with some practice and enough time, your voice should settle into something very natural sounding.
Hope this helps someone!
Amy