My girlfriend jokes that I didn't come out of the closet, I kicked the doors off. I came out last November and just told everyone. She asked why and I told her it was to force me to transition. I had tried when I was 19 but chickened out because I hadn't told anyone so I felt safe giving up. This time I told everyone so I would keep myself motivated. I wouldn't suggest doing this unless you're a "don't give a care" type of person and have a good support structure in place.
The one thing I've noticed is that things never really go to plan. I wanted to come out this spring, ended up blurting it out last November. I wanted to wait until I lost all my weight before I started therapy, I started with about 40 pounds to go (still got 20 of it. Estrogen + weight loss attempts=

) Then I was totally gonna wait until I passed full time to get my name changed...the expected birth of my son made me want to have everything done before he got here. Also, I don't pass very often, so, there's that... sadface...
Even though it's good to plan stuff out, don't feel like you have to stick to it. Just do stuff as you feel comfortable and as you need it. Everyone else will either deal with it or they wont, nothing you can do about it.