I am going to a community college and there is like 4,000 students. At my high school people weren't so accepting and I feared that at college.
Not very many people knew me there and I didn't want them knowing my birth name which was legally female, now it's not. It was my biggest fear and I have problems with confrontation. It's just easier for me to email. I switched out of one of the classes because the teacher said the students would have access to the roster and I'd have to explain it to the students.
I live in the bible belt where most people are conservative Christians and would love to have something to taunt you with. The other teachers that I emailed where great about it. On the first day of classes they called me by Shaun and male pronouns. When they had to email me along with multiple students they would use my personal email so the students wouldn't see my email address which had my full female name in it.
Since you weren't already stealth I think the best approach is to talk it out with the teachers and the students will or won't catch on.