Hi, Jenna.
Congrats on your progress. I do have a question for you, however.
You are 33, and living, studying and working in a university setting. You are out to most everyone at this point. Though I understand this is a process, my questions is- why are you remaining in male presentation much or most of the time? For whom are you staying male?
Surely, the university would not have much of an issue with your modified gender presentation. If you went to school as female, you would negate this "back and forth" problem.
To your question about confusing your friends, I would simply say that yes, it is quite confusing to them. I understand that some people here on Susan's are andro, and prefer no gender boundaries. That said, most of society lives in a gender binary world-male and female. The most difficult thing for me was living between genders, especially after I was on hormones, but needing to remain in a masculine role at work until I could transition.
I would say that you should give the whole matter a good thought, then pick the time and method of going full time. Only go full time, however, if this is right for you. If you haven't gotten into gender counseling, I would strongly suggest this.
With your present dilemma, I would say show up as your femme self if you feel more comfortable doing so. Since most everyone knows you also as Jenna, this should not be a problem. If, however, this event is in a rough and tumble bar where your presentation would cause a row, then you might think otherwise.
Good luck with your new self!