and remember, if you're someone that does stim/twitchy things for comfort, this is NOT the time to resist doing them if you're there and need to do it. Not unless it's actively inhibiting something, like writing.
Yeah from what I've read you don't want to be "prepared", you want to be "natural" because otherwise you might self suppress behavior that they're trying to observe
He was nice.
I was scared
He thinks its worth doing the second part of the assessment, but that part costs money.