Okay, sure - if you are going to headbut someone, or shake their hand with so much force you break bones in their wrist then, yeah, probably you need to chill out a bit and relax - but apart from that just be yourself.
If you want to imitate someone, then fine - go study and watch and learn - repeat and repeat.. you will be able to ape them - no problem.. but you know, that is not what being a woman is about. Not even close. That is what pretending to be a woman is about.
Passing is the worst stick that anyone going through transition is beaten with - and mostly beaten by themselves. Sure, we have body dysmorphia - so, that means, we don't like how our bodies look and gender dysphoria as we don't like how we are accepted in the world regards our gender - that doesn't mean the answer here is to play act a role - If you transition, you are going to have to live 24/7 in the role you are wanting to transition into - so here is some of the best advice you can ever have - don't sweat it - chill out and be yourself. Love who you are, find you. Look at yourself, watch yourself and learn to love who you are and except that everyone is different. Wear what clothes make you happy, if you want to do makeup then do it, learn to do it or don't do it, but make it your choice. I know women who do no makeup, a little, a lot and variable depending.. Clothes, the same - I live in jeans and T.. I did that before too. I wear a dress occasionally, but it's not a big thing. If it is for you then do it - don't follow what some idiot on the internet says.. including me!
Passing is a misnomer - live and look in a way that makes YOU happy not how you think other's want you to live or look. Passing is the reason a lot of people don't transition and that is sad, because you are beautiful. Go now, look yourself in the eyes and tell yourself that you are beautiful. It's true.