I am in the middle of 1st year exams at the age of 59 so it can be done. University would have to be one of the best places to transition, as it is about asking questions and trying new things. I admit I was full time with my name changed etc, so it was quite easy for me.
In your case probably talking to someone in the enrolment section would be the way to go. Simply saying that you are in gender transition, and how do you go about enrolling under your female name should do it. You could also ask about their GLBTIQ policies and support for students from diverse backgrounds, counselling services etc. This assumes you want to try living part-time while there of course, even if not until part way through your course.
Returning to study is probably the second best thing I have done in the last few years, and I recommend it to anyone who can manage it, even if only part-time.
Karen.