I have never asked what my therapist's expectations are because I don't expect her to have any of me. I have them for myself, to make the most of the time I'm there by being as honest as I would if I were in the ER. I don't need to tell every random thing, but if it's relevant to my symptoms, I bring it up so I can do something about it. It sounds like you've got symptoms that would be very helpful to mention and address. I hope you can find a way to do that.

As for the ground rules, I've never had a therapist who had any. (And none of that talk about a therapist's boundaries that I see from others here on PC.) My current therapist asked me what I was looking for from her, what I wanted from therapy and that if I wanted to do X Y or Z to let her know. I didn't have an answer to the last one, but it's not necessary to have an answer. We figure it out as we go along.

Bottom line: You are in the driver's seat. Don't be shy about taking your sessions where you need to go.