Hey Samantha,
I sure can't comment on "normal" but it certainly seems typical to have some apprehension, anxiety and excitement about making progress and facing another big step. I do agree that you are, in a very real sense, transitioning by acquiring and absorbing knowledge about yourself and the trans experience. One of my great ah ha and lightning bolt moments had nothing to do with hormones or what I wore. It was the clear acceptance of who I really am, as transgender, beneath the decades (i'm a senior too) of repression and denial.
Yes, a new faze of life and a fabulous opportunity awaits.........