Thank you all for your comments and suggestions!
These are the things I hope to bring to class and especially today when I try out!

I think I'm unique in that I have had the uber-extreme indoor cycling experience- when it was first a big thing in the 90's I took a class at my gym and it was so awesome (read serious sarcasm here) that it took me only TWELVE years to go to my second class!! That instructor had us doing crazy things that I was not capable of, even though I ran marathons and was in good shape. And since my love affair started with indoor cycling, I've had two C sections and one shoulder surgery as well as the very tough transition from surgery/couch potato recovery back to gym-goer so I understand the importance of everyone going at their own pace (even if I don't always do it myself when I should, sadly).
SO.....
I'm going to read everyone's posts one last time, burn them into my memory, shower and head off to the try-out.
If all goes well, I will rock it, become employed as an instructor and tell you all you helped me out!!!
Cheers,
S