Even when you have completed the course it will take another 100 hours or more before it starts to gel.
Yep!
Just make sure you fully understand what you're going to teach when you're on the ground so you're not fumbling in the air when the pressure is greater.
Practice the patter over and over in your arm chair.
Generally less is more - when demonstrating and pattering
Break it down into bite-sized bits
Good luck with it all