Hi Mark, thanks for your comment!
I’ll confess, all of my teachers have been women and this hasn’t been an issue, precisely because they were teachers. Accredited teachers are trained to point out the gender differences in language.
This tends to be more of an issue for people who learn casually from a partner, friend or spouse. I would definitely recommend being aware that there are strong gender differences in Japanese, especially in casual speech. If you are a beginner learning mainly “desu/masu” Japanese, the differences are quite sparse.
To sum up, if you’re a guy, you can have a female teacher, but you may want to find some male drinking buddies.