As others have said, ACTS/PROVE are huge. And never point a gun or have your finger on the trigger or even inside the triggerguard unless expressly told to do so. You treat every gun as if it's always loaded until you have checked it yourself, and the second it passes out of your direct control it becomes 'loaded' again. During your practical exam(s) pointing the gun at yourself or the instructor is an instant failure. During my course one guy was actually asked to leave even before exams because during the hands-on portions he repeatedly pointed a firearm at himself or others and/or had his finger on the trigger.
Beyond that, just read your books and pay attention, it's not rocket science and (except for some of the laws) common sense will take you far. If the course is anything like the one I took, you will have regular lecture-style class with a few "quizzes" and Q&A on important points, and a 'handling' section with various types of rifles/shotguns to get a feel for the guns and learn proper loading, clearing, stances, etc. If you're taking RPAL course as well, it's basically the same thing except you'll learn the restricted laws and handle various pistols. In short, nothing to worry about.