Gaia,
I'm a "woman freediver" (started when i was a girl

) and I have been diving for
more than six years. In the freediving community I have never been treated
with anything but respect and comraderie.
So trying to start a sexist war here is a total waste of time.
Do a course if you feel like it, but don't go expecting freedivers to fight your
somewhat silly battles, we're all way too tolerant and just like each other
way too much.
Rather just enjoy the water and the freediving attitude and mindset.