I spent years of introspection, trying to figure out what and who I am. Part of that was due to the fact that I didn't want to admit to myself the implications of what I knew very well to be feeling. I wanted it to go away. I wanted to be cis.
Well, I am not cis and I never will be. And, that's fine. It has to be fine, because it is the way it is and it isn't going to change. Labels? We are all "off lable". Lables are used to group, and pigeonhole people. They are a shorthand way to describe yourself or someone else, but fail to caputre any nuiance.
I assume that you appreciate the natural consequences of taking HRT, and since you are excited, I think you will probably like the results. Best wishes towards a more fulfilling life in the near future.