Hi Wukin,
the best series of tutorials about voice training for MTFs I've found is from CandiFLA, one of whose videos on the subject I've linked to below. She is able to switch seamlessly from her original unambiguously male voice to a lovely unmistakably female voice, and it involves 'squeezing' the voice box or applying some muscular pressure to it after going into falsetto, which makes the voice sound softer and more feminine, and from there you can lower the voice--which is now in a female range of tonality--to a more comfortable level. Basically, you need to be able to train your muscles to be able to hold that higher 'head' voice, and over time you will strengthen those throat muscles and will thus be able to gain control over your tonality. While I'm still in the beginning stages of learning how to train my voice, Candi's method does work for me, though it's taking me a while even just to get my brain accustomed to speaking higher, much less to getting the right tonality. It's a series of slow steps that requires a lot of practice, whatever method one uses.
Here is her video, and check her channel for her others:
