Rachel, the most important thing is that you feel comfortable with yourself and the body you live with. I see that you did reflect about her suggestions, and you reached your conclusions! They are yours for you and your body, it is nobodies business to tell you they are right or wrong!
From looking at your picture, you look pretty female to me, I would not misgender you at all looking at that picture!
I know what you mean with being tall, I am 6' and I like to wear heels, and they make me really tall. But I don't care, and all my cis friends tell me it is not a big deal for them either.
Talking about shopping, specifically shoe shopping, I used to be they guy with 30 pairs of shoes, and I am on my path to be the girl with that many shoes! I like to be dressed well, and a little with it, it seems as if you and I are similar in that aspect!
Nature was nice to me with my voice and my female looks, ad allowed me to keep all my hair on my head, and that made it easy for me to transition. But otherwise I have the same issues most trans women have, self confidence, and being my own biggest critic.
I seem to be at a point at which i pass 100% all the times, but being older that seems to be easier, because older women are expected to have some wrinkles, and also, very important, they have lower pitched voices. I know quite a few cis women who have a lower voice than I have!
But I think the biggest single issue for us is the self confidence. As long as we tell ourselves, we might not pass, we will be so nervous around other people that they start to look for clues, and they might find some.
I wish you good luck, and that you achieve the body which your mind wants to have!
It is your body, and you have to live with it, nobody else has, and nobody else has a saying about it!
Hugs
Linde