Hello.
I guess you have done the hard part, you know who or what you are. Expect wobbles.
I find it easy to see what you should do, because it's what I should do - it's the doing it that will be hard, which I suppose is the purpose of this website, so we keep eyes on each other.
My advise that you walk in the direction of your dreams.
I don't know whether you are physically male or physically female. So I am going to give advice as if you were born a male and that letting the more feminine parts of your androgynous nature express themselves is a large part of the problem.
First, do things to build your confidence. There are lots of activities, like gym or karate or some other thing with a proper goal that you can achieve. It is very important that you build your confidence up in a more general way before trying anything else.
Second, change the things that no-on will notice. Read books, listen to music or watch films that are out of your normal type of thing. Have a girly night in with yourself with icecream and wine, wearing girl's pyjamas - paint your toenails. (If you live with people, then wait a time when they are away for a bit. The films and books and music can be done any time.) Another day get some beer and explosions and crisps. Enjoy both.
Third, where you have felt a need to hold back your actions or thoughts to not stand out; don't. People may notice slight differences, but you will feel it more than they will see it. This is where the real you comes out. You should like this bit. Don't go nuts, just let some fun little things out.
Fourth, buy a girl's belt. Nowadays those sort of things are interchangeable. Wear girl's underwear at some time...these things might build your confidence as yourself without any recriminations.
By this time, things should start to look up...
However, all this talk and I am too scared to start too.