Sit right in front and learn all you can. You've paid
Take your old machine you'll only be straight sewing.
Wear comfortable clothes.
Carry your equipment in whatever you have.
If you knew how to do it you wouldn't need to do the class.
Go with an open mind.
Relax and have fun. If you don't walk away an expert at least you'll know more than when you arrived.
Have a great time.