My main concern with transitions are the turbulence of the persons mindset.
...yeah I worry about that too, but it's kinda damned if I do and damned if I don't.
If I remember correctly, you've had this on your mind for a couple years and have embraced being more feminine. In that aspect I'd say you're in a better position than most.
Embracing being more feminine to me basically just meant not holding back stuff that others might judge me for as much... in ways that happened to appear feminine. I only really started holding that shit back more when I became a 6th grader, but puberty is a fun time to start repressing an abnormal display of "gender norms".
I'd spent so much time telling myself that I couldn't be that way that I just kinda stopped expressing instead of reverting to the other mindset or something. I don't know if this puts me in a better situation than "most", just better than some of the heavy handed ones who thought it was this magical pill that'd "change everything". I am not under the illusion that it's going to all go smoothly and that I'll be "a real woman", that's fucking bullshit, but I'll be that much closer than where I am now.
I'd say the view that I'm going to have to put the work in instead of just have everything handed to me for going through some perverse form of "rite of passage" is most of what's in my favor. If it's not good enough, in this area I'd care enough to try harder.
Personally, I'd advocate against it. I don't believe in changing integral things about yourself, your physical anatomy being one of them. I think it's a slippery slope with a good chance of making you a lot more vane.
I'm already stuck mentally on my own vanity and have been for a while, but much like when my room goes from perfect to a god damn mess... it's been a feast or famine kind of thing.
Trying to ignore my appearance because "it's wrong" isn't really good for me either, and the baggy clothes don't exactly hide those feelings either even though it hides my form.
There's also the risk of just mixing up your mental formula. These chemicals will alter how you think and feel towards a variety of things. I guess just be ready to relearn yourself if you're up for it.
The emotional factor is where I feel more prepared.