First Step of Becoming a Real Sissy (M/m) (F/m)

Quick background before any of this. Yes, I identify as a femboy. A sissy. A trap. Whatever you want to call it. I'm bisexual and submissive to both genders with a tendency to fantasize about what I suppose are typical fantasies for someone like me. Well, most are typical. The others are, well, atypical. I'm 5'2 due to some strange twist of genetics, I weigh 120 pounds. I go to the gym as much as I can, though this has left me with a flat stomach and a bubble butt more than it has given me definable muscle. I've got rounded, a pixie cut, and a generally petite figure. To top it all off, I've got a below average manhood topping in at a "staggering" 4.5 inches. Until a few months ago, I was a virgin at 19 and this is the story of my first sexual encounter.