What is the university's dorm policy? Are TG people housed according to their birth sex, co-ed, or self-identified sex? It makes a difference.
What is needed is:
#1 - Understanding, tolerance, and respect! Treat everyone the way you would want to be treated and insist others do the same.
#2 - Privacy. No matter what stage a person is at, they need privacy for toilets, showers, and changing - NOBODY should be made to feel uncomfortable.
It is probably too much to hope that the university would use the student's chosen name and gender .....