Being 100% honest, I think you're very cute, but I would not say 100% passable. I think you can be, though! If I could recommend, I'd say that you should work on your eyebrows, find a girl friend that will help you with makeup or join makeup groups and stuff on facebook, pinterest, etc. and do some girly workouts. Also, finding the right hairstyle and learning how to style your hair can work wonders.
I sincerely hope you do become passable and live out your dream of going full time <3 It's a lot of hard work but it looks like you're passionate about it. Much love~<3