Hi My Dear:
Passing and being comfortable about it is: 75% mental attitude, 15% presentation you control, and maybe 10% you might not have any control over.
I'm 6'2" in my seventies now, played college football, have an athletic build (still); however, once I gave up that I was 'special' and began to be me I was fine. BTW: I love wearing heals, boots, long dresses and skirts, leather, big jewelry and . . . you probably get what I am saying by now.
Getting there took a little time, ~1yr, and having lots of GGs who accepted me for who I am - I worked at it. I'm very social now, speak publicly a lot, am active politically and raise a lot of money for worthy children causes . . . I don't have time anymore to wonder if I'm a woman - I am.
You aren't me; I get that. Be whoever you are go after what fulfills your life. Being a woman is easy when it's who you are and you go about life accordingly 24x7. Have I been read, yes. Do I care, only to the extent that caring is the feminine thing to do but not enough to have it mess up a great life that I love dearly.
You are a beautiful woman, as soon as you accept that then you are a beautiful woman!

TTFN,
Rachel