Most people who are average in attractiveness, in sex, in acting, etc dont become a porn star. Most people become average, dont gain much and only some limited people become a star as in it happens in everything.
If you think this is easy, you can try it out. As I said gender isnt a major factor as you think so. As a guy you can enroll to gay porn and straight ones. Male-male porn has more audience than female-female porn. Every gender has its benefits in the game.
Good luck.