Once you sign up, most BB instructors will give you a "package" that includes an open book test that need to be completed before your first session. I found using a PDF copy of the rulebook very helpful as you can search keywords. This is extremely useful because the rulebook is long and it can be difficult to find information on the topic you are looking for. It is basically all about safe gun handling on a firing line and safe holster practices. Don't fret, just listen to your instructor and do what they say.