I am above 6" and it bugs the heck out of me. Not because of how others will see me nearly as much as because my sense body is closer to 5'9"-10" and I feel stretched out all the time. My cister is 6 feet tall, looks like a supermodel, and I've seen her rock Vegas in three inch heels because she felt like it, hand in hand with a dude that was like six inches shorter. I'm reasonably sure the stares she got were because she looked hot- I developed a bit of a hyper sense for it during high school because the only somewhat civil thing the vast majority of males would deem to talk to me about was how much they wanted to boink my sister.
A month or so before I began HRT I was in Fred Meyers to pick up some meds. My partner and I bought some groceries while we were at it, and when we saw that one of the cashiers was a transwoman we hit that line to check out. She was definitely over six feet, probably taller than me, and standing on the little platform she looked even taller. Her breasts were clearly there and so was some dark stubble under her chin. She didn't exactly pass, but anyone who would have misgendered her would have had to be blind- well actually no blind person coild have clocked her.
She was flat-out gorgeous.
And her smile... like, wow. I kinda had an instant girl crush. Voice on point. Her manner almost perfectly feminine and no overacting. She had an excellent sense of style, and she just had this aura about her that these rare humans sometimes have that make them easy to compliment. In short, she made a profoundly positive impression without even trying. Sure, there were the same cues I've got, but on her they were just minor details. It's like you could tell, but her entire aura was so clearly and unquestionably female that those things just sorta slid right out of your vision and it couldn't be bothered to notice. It was absolutely awe-inspiring.
Just walking through that line made me feel a million times better for weeks.
So height doesn't mean a thing. What matters is attitude, effort, manner, presentation, self confidence, knowing how to dress yourself, and most of all transitioning because it makes you feel alive and whole. Everything that actually matters is learnable, and even if you've got no eye for fashion it's easy enough to ask someone who does. Just be willing to listen and take criticism, and it'll save you far more dignity in the future.
The key is to dress like you, rather than an idea of how a woman is supposed to look. Be comfortable for your own reasons and that's the vibe you'll give off.