I don't know if it will help anyone to hear this, but I'm a cis man, and I constantly get misgendered in drive throughs and on the phone. Even after telling them my basic male name, I'm still getting called ma'am. I guess I just want to put it out there that in my experience, people are not good at telling gender through your voice. So if you're still working on it, that's ok. I just don't want you to feel bad if you're not quite where you want to be.