lol about the shower- I always sound better in there too

Good for you for picking up and finding a new T!

I find that I do better letting them get a sense of my strenghts and weaknesses together. If I go in and just fall apart, telling the story of all my flaws and horrific bits of my history,

a. It's uncomfortable, hard to be emotionally present, and hard to make a connection while spewing

b. It only gives them part of the story, for although we're there to explore and heal the problems, we can't do it properly if they don't see all my successes and strengths too.

So, if it were me going in, I would talk as if I were meeting a teacher for the first time, one on one- a mentor. I'd talk about things I'm comfortable with, like my work and interests, and I'd also mention my key issues, but in a more general way, kind of... resume style, keep it to one page, ya know?

That's not elegant at all as I've explained it, but... hope it helps a bit. My main thought is, don't pressure yourself in session one- performance anxiety rarely helps.