I've been doing this and I have made progress! It works, voice training sucks, like 80% of my struggle with it at the start was the cringe and then the next 80% of my struggle was using my femme-est voice I had out in public. I feel like I have such a long way to go, but when I've tracked my voice over the last year even though I still don't like it - it is more femme and that's undeniable by the comparison.