They'll go over the ramifications and possible risks of HRT, do a quick physical exam, stuff like that. They gave me my first breast exam at mine, which was a little weird in principle, the actual exam wasn't bad at all. They may ask somewhat probing questions, but if there's anything Izzy doesn't want to answer she doesn't have to. The whole point of informed consent is there are no gatekeepers. If the form is signed then they have(?) to provide treatment.
If they didn't say anything, you're not supposed to eat after midnight the night before the appointment so they get your fasting...uh...blood...thing...Nobody told me so I had to go to a different lab place the next day to get mine done.
All in all the scariest part of the experience, by far, was the fear of the unknown leading up to it. Izzy will be fine