This is just my to peniworth Pebbles.
Be honest. You are who you are.
I can so identify with not being part of the in-crowd. Personally, it was never for me.
You already know, form your own and everyone else's experiences, that some will be negative, some neutral some positive.
Dress as you feel comfortable, but don't try to conceil yourself.
As for your studies and lab partners. I'm not sure how you go about arranging this. I believe, in some, notoces tend to be pinned all over the place asking for people to partner with. If this is the same, or similar, find a few you like and ask to join them. Be bold. You don't have anything to apologise for. If you can do the work then that should be all there is to it.
If someone says they don't want to partner with a transgenderd person then thank your lucky stars you didn't get them anyway. Such narrow minded biggots tend to have a very limited view of things generally.
hope this helps.