Gwen, I think you'll be fine too. I've seen a lot women around where I live and even know a few. It's really nothing unusual these days.
I know the feelings you've had, I have them too even now. Only my problem isn't necessarily my height, especially these days since I'm in a wheelchair, but it is my weight and my age. Izumi gives me quite a bit of hope, I just don't know if I can do it though and I have no other idea how I'll ever get my weight down enough that I could even have a reasonably androgynous figure.
The big thing however, is that I am choosing to finally start acting on my desires to be the woman I've always wanted to be now, after I am already over 40 years old. Even if I accomplish the small miracle in front of me to become feminine enough to pass myself off as a woman, I feel that all my good years to enjoy life as one are almost over. Also fueling these feelings of doubt is the knowledge that unless my health get substantially better over the coming years HRT is as far as I will be able to go. I've wrecked my body enough during my years of self loathing at being in a man's body, that now I have a huge amount of circulatory problems and the doctors I'm seeing now have all stated that any surgeries are a bad idea since they don't know if my heart could take it.
Still, I'm worried less about passing in society than I am just appearing feminine enough to appease myself.
In no way however do I mean to say that you should hold off on your own transition, Gwen. As I said before, I think you'll be fine too. The height really isn't that big off an issue these days and neither is broad shoulders or anything else. I've known some GG's that were distraught over not having wider hips and more in the back. I completely share their feelings now just because I know that modern medicine still can't alter a person's bone structure.
Anyway, enough of my own lamentations. You'll be just fine.