I have read and enjoyed science fiction since the age of 10 (introduced to it by my mother), but I can see what you mean. It's not only male white dominated, it's USian/Anglosaxon-dominated too. There were some early French writers, but not a lot since; other languages don't get much of a look-in.

There are good female writers, though rather more in fantasy than SF. I'd recommend Ursula K. Leguin, and especially "Winter's King" for a wonderfully different take on sex, gender, and race.