I've considered VFS but cost-wise it's not really in the cards anyway, but voice coaching can help a lot. The points one voice coach works on with the client are:
* pitch
* quality (gravelly, hoarse, tremor)
* loudness (do it softly and at higher volumes)
* resonance (where the sound is coming from in your body—this is how a man and woman singing the same note can sound so different)
* articulation (speaking clearly—men can tend to mumble and slur)
* phrasing
* pacing (speaking at a natural tempo)
* melodic intonation ("sing-song")
* fluency
(I copied these from notes from my voice therapist.) I believe pitch, resonance, and melodic intonation are the big ones, but they all play a part, especially if you feel you're straining to get to the sound you want. There used to be some trans voice coaches online but I haven't looked for them lately. They had online courses, mostly free, trying to help others out. One person I found very helpful, though she had a hard time explaining it. She had a big influence at the time (last century). Another person who was popular I felt was off base and encouraging bad habits, but I'm no expert. Maybe there are some good ones to be found out there.
I'm actually enjoying the exercises.
Also, I too was very impressed by the many videos posted by women who went to Yeson. It's almost like magic. But even with the surgery, as they will tell you, there's still a lot of work to get there.