I agree--no question is a bad question. Trust me, I received a variety of questions when I taught lessons! My favorite... in the middle of a lesson, a 9-year-old stopped and asked me if she could ride sidesaddle.
My best advice is to listen to your instructor, ask questions, and HAVE FUN! You've ridden before, so you know the basics. Don't expect to be perfect the first time around, and remember that you're learning a new skill and you will improve with time and hard work. Also go in knowing that some lessons are going to knock your ego down a peg or two--horses are notoriously good at doing that. But it only makes us better riders in the end!