Welcome to APC, Red Sox. You are going to be seeing something really new on your first flight and I hope you enjoy the experience. Knowing the basics of the airplane would be the best use of your time until your flight. Perhaps you could find a book at the library on basic flying. Your instructor will gauge how well you mesh with what you doing and they will decide how much control to give you. The general rule is to give students as much control as safely possible though, so expect to fly the whole time. Disco flights are usually around 30 minutes. He or she will "ghost" the flight controls and tell you what to do. You can even land the airplane. The hardest thing to control when ghosting a student in these airplane is the throttle, so keep a light hand there and don't resist if the instructor does something over your hand. Have fun. Take a camera. Offer the instructor a tip.