ill play devils advocate and say if you're worried about caring about passing, being feminine, having a male past, etc... unless you are really feminine right now I would not attempt trans
meaning, if you can NOT transition... don't
I felt the same way as you, now I am overly concerned with passing, looking feminine, etc .. it drives me Cray Cray
then again, you are 19, and when I was 19 I wanted NOTHING to do with anything feminine and fought my feelings to trans
this is me at 24

and 27... do I look like my sister? OMJ I never thought about that!

now I obvy pass, but I beat myself up over being a ->-bleeped-<-... but then again I've only been fulltime for like 8 months
I don't know if getting a vag will help or not, but my Dick has really stared to cause me anxiety lately, along with my hairline, and my small butt, and my big head (girl hats don't fit me), my height!, and my wide waist, wide chest, my silly fake boobs, and my FFS surgery scars, and my voice, and my big hands, and my big feet, and my lack of socialization as a female, and my overt awareness of having once been male and trying to make sense of it. oh and don't forget having facial hair cause blonde hair is still prickley, and my concern over whether or not new friend will like me or not when or if they find out I have a penis. and dating, that ->-bleeped-<- sucks ! s
if you don't have to trans, don't
however... if given the chance to do it again? would I still trans? yes, but I would have done it earlier :-) because I feel like if I would of had less time developing a male persona I would be happier, at least thats what my brain says LOL
or maybe I'm just a crayzy person?