I am starting in my late 20's. I feel like the day I first began being open with myself and and a very close friend of mine was when my transition began. I'm now out to the people who matter most to me in my life (all three of them, one of which is family, lol).
I'm pre-everything. I've started face laser, as well as epilating all of my body hair (and trying an at home IPL device for my chest/inner thighs, armpits, seems to work very well so far, but I have no idea if there's any permanence to the hair loss), and experimented with make up, and that's all so far. I've met other people in the local trans community by attending a conference, and a local support group. I've let go of my anxiety about presenting to be more male than I feel, and let myself just be who I am (if that makes any sense! lol).
I want to start hormones soon, and have a doctor and therapist who are both wholly supportive of my transition. It feels great to finally be myself. I feel like have a lot coming up in the future, not of it will be easy, but so far all of the little changes I've made have felt wonderful.
I am super nervous about changing how I present. So far, my nails have gotten a bit longer, and I've let my hair grow (though not styled at all), I plan on getting my ears pierced soon ^_^. I've also gone back to more of how I spoke/gestured/walked before I was gender policed by bullies during my childhood.