It's easy to look too far ahead, I think. And I think that can make the changes seem more intimidating.
Before T, I'd imagine how I'd feel with the right hormones in me - how I'd feel if I was stronger, how I'd feel with the new hair, etc. I always imagined it feeling drastically different from my current self. And that makes sense, given that my body back then wasn't what I wanted and didn't match how I saw myself. But it still created a sense of mismatch and complete "difference" which was frustrating not only because it was dysphoria-inducing but frustrating because it's hard to keep uo when it just doesn't match where you're at.
Taking it day by day is the easiest thing. Now that I've been on T, I've come to see the testosterone-fuelled me is different, in some ways, but not at all in the ways I expected. Changes like my body hair, and in my face, they do make me feel different and more like myself, but again, not in the way I expected. It comes out of nowhere it seems, but when it does, it's never a shocking change. I just think "hey, here's all this hair...! Yeah, of course, that should have been there all along.

" Same thing with emotional changes, they're not at all what I expected but they are totally right.