Since I just took my CCW class recently, I can tell you that the best thing to do listen very well and ask questions when you dont understand something, but dont be annoying about it. You are taking a good first step by preparing and asking for advice.
Remember, your instructor is the expert, and you are paying him to teach you. Get as much out of it as you can. I asked about alot of possible scenarios to my CCW instructor, and he was happy to explain and give me examples to my questions.
Most of my questions were specifically about the process of getting my permit, and what to do and what not to do. My instructor asked me what my reasons were, and he told me to think about them and write them all down, and email them to him and he would tell you what not to write and how to make it sound better so that you wouldnt get rejected.
I would read through some of the posts in the "Tactics" section on here, and bring up ones that concern you to your instructor as a good way to prepare.