The good: Your torso, from your waist to hip ratio, the slightness of your shoulders, your tush. This is really a good starting point. And you've already grown out your hair somewhat, so this should all be pleasing.
The bad: As you rightly point out, you're underweight and this leads to the exposure of your skeleton and musculature. It's most pronounced in your forearms and hands, and all those veins popping out are very masculine. The good news is that putting on weight will help with this, especially once you're on a higher dose of HRT (the mods will undoubtedly erase your specific dosage, as that's verboten here). But even a low dose can start to deliver modest results.
The ugly: Seriously, a Sergio Leone reference?
In the meantime, you might want to consider some long-sleeved tops, but still nicely fitted to show off your waist. Also, don't curl your hands in at the wrist. Keep your wrists straight, or even slightly bent out -- it'll break the line the of your long arms, making them look less pronounced. Likewise, curling your fingers in makes you look like you're about to form a fist. Finally, keep all that skin moisturized.
And, of course, start working on your voice and attending to facial hair removal.
Yours,
Sophie