Of course I am biased but I have always thought a human changing gender was one of the most difficult things to attempt.
As far as I am concerned, as I began to become more serious about making the jump to a transgender feminine life, I began to practice feminine mannerisms when I thought others weren’t watching. I would go to big box stores during their down times just to practice my walk.
Make up wasn’t such a problem for me as I had been applying it for literally decades before I seriously decided to transition. As I remember though, I had to remind myself to not overdo it. As I started to go out and live with women and be accepted, I had to learn to blend.
Of course, all bets were off when I started hormone replacement therapy. Even though I started on a bare minimum dose, the changes began to be very unmistakable. The obvious happened, I grew breasts and let my hair grow out. The surprise came when my skin softened and my face began subtle changes. All in all, I had planned a year before I had to put my male self in the closet. I ended up revising it to six months.
As I look back to the whole experience, I was fortunate in that I found a small group of cis women to socialize with. I always say they taught me more about the feminine lifestyle than I could have ever learned on my own. But learn I did.
Putting my old guy self in the closet was one of the most satisfying things I have ever done. Overall though, changing gender gears was as terrifying as it was exciting. It was an experience I was born to do.