Study the limitations you can understand, you dont need to know everything when you show up. You honestly could wait to start anything until day 1. Week 1 is FOM, so basically you have a week and a weekend to study limitations. The FOM stuff is just rules and regs, listen and you wont have any issues. Maybe look over the stuff that was talked about each day, in the evening. The program is designed for the slow learners, so relax and take one thing at a time. Study limitations first, and then slowly learn the memory items, cause you wont understand some of them until systems.