Hey,
I'm about to start my third semester at university, myself, and I'm a bit nervous as well. Last semester, I started dressing more as a guy, though not all the time.
I'm still registered as my birth name and such, and I doubt that's going to change any time soon, unfortunately.
Anyway, the biggest piece of advice I can give you is to start building a support base early. Talk to your professors and make friends, and start feeling people out. I suggest you see what they think of LGBT issues in general first. I got lucky - two of my professors were obvious LGBT allies, and so I started to talk to them, though email and by staying after class. At the end of the semester, I came out to them as trans, and they were both awesome about it. Now I have two allies on campus that I know I can go to.
I can't give you much advice about talking to your peers, as I'm terrible at it! But I am a member of one club, and that lead me to the LGBT group, so maybe try something like that?
And if you ever want to talk about university, or anything really, feel free to message me!