This whole trans vs cis thing is just silly IMO.
LTL, You are just a young twenty-something girl. Trans or not, it's largely unimportant isn't it?
Having said that, I don't know how well you're going to pass or blend in... Perhaps your therapist is trying to ready you for difficulties in that area? From what you write though, I don't think you have "internal problems with your transgender nature".
Passing is also extremely important to me... I've said numerous times to my therapist, under no circumstances do I ever want to be seen as a ->-bleeped-<-. I've also mentioned that if I didn't think it was possible to pass 100% at the end of this, I'd have potentially have left this world already. And there's allowances for surgery etc. But that's how important passing is to me. But, like so many others, I can achieve that passing goal too...
I might just mention for anyone interested, I do see numerous transwomen about on occasion. Yesterday I ran into 3.
The first lives close to me and I see her regularly on trains. She passes very very well, and is the ideal size and shape. Her voice is fantastic, and were I not aware of what to look for, I'd never have identified her. She'd pass 100% easily. Sadly, she usually makes a B-line for anywhere else if she sees me... Perhaps worried that I'll out her or something? As if I would.
The second was at the other end of the train journey... I'd not seen her before, but she stood out from the crowd. She was maybe 6'4, and then had heels on too. Overdressed, and really pushing the female image, perhaps too strongly. She didn't pass 100%. I was watching reactions from people near her... They were polite and all, but were uncomfortable near her. And she seemed uncomfortable around people... I felt a little sorry for her...
The third was later in the day. She too was tall, and I'd seen her around before. Perhaps she was a late transitioner or didn't have a great starting point... She was built like a labourer... She knew she didn't pass, but that didn't seem to bother her in the least. She walked proudly, and while people noticed her, they seemed to just notice and then pay little attention. I think that comes from that strong and confident deportment... Much respect to her.
In terms of trans girls, there are many baskets, but I think the three girls above account for a large portion of us. There are those who can, or try to be stealth or blend in... Those who needlessly draw attention to themselves... And those who are comfortable and proud despite any physical disadvantages.