I understand one of those acronyms after a year and a half. They haven't fired or failed me yet 😂. Honestly you'll have more than enough time to learn what you need to know and our training department does a great job. If you have prior 121 it's pretty easy, the curriculum assumes you have basic working knowledge of the regs. If you don't have prior 121, I'd suggest learning the applicable regs via the everything explained book before class.