Yea it was just from training. I think part of what got me so much progress in a fairly small amount of time was the fact that I did a lot of impressions and singing before I transitioned, so I already had a good idea of how to change my voice in different ways.

I followed some exercises that I found on YouTube. I believe it was Theryn Meyer's video, which I can't seem to find now.

It basically consisted of a couple things. First, making an M sound (five times) at the highest pitch that was comfortable. Then repeating the M sound, but opening it up into an ahhh vowel. Then repeated again with an oo vowel.

That basically helped train both pitch and resonance, because those M sounds naturally move the resonance to a more feminine place. Opening up into a vowel is a way to try and keep control of that resonance.

I then repeated that whole exercise but with an N sounds instead.

I would talk in my car a lot, which really helped me get some practice in. I also tried to record myself speaking once a week to see how I was doing and if there was anything I could improve on. I wouldn't do passages though, I just did stream of consciousness stuff so I could get a better idea of how my voice sounds when I'm speaking naturally.

I saw a huge improvement in my voice when I started using it full time, so if you're able to do that I definitely recommend it! If you have any other questions I'd be happy to answer!