I wish I could say I knew what it was like to be past this, but I can absolutely relate. I'm going to be starting HRT, myself, and I feel like there's two things going on for me. One is the fear of change that comes with any big life decision (the last time I decided to move to a new city with no friends or associates, I was concerned about what the future held, too). The other is the change itself, if that makes any sense. I've had a routine for years... wake up, get a cup of coffee, feed the animals, take a shower, shave, get dressed.
The logical part of me knows that, as I just described it, there actually wouldn't be any substantive changes. But, there are subtle changes creeping in. I'm going to be doing laser hair removal, so I won't be shaving my face, anymore. I'm going to be taking hormones, so my body is going to look and feel different. They're changes I want, but they're also changes that disrupt what's normal, to me, and that makes me question all of it. I think eventually, though, I'll find a new normal.
At least, I hope so.