This. If you can show up with limitations and memory items down you're ahead of the game. Don't worry about what or why they are, that will come when you get in class, just know them. If you have the chance to start learning flows from the SOP's as well, that will be beneficial. Again, just go for rote - don't worry about why you're doing things, again that will fall into place as you learn the systems. One of the issues I see with people is they don't take time to study for the sim because they're so worried about the oral, if you can get the rote items down ahead of time, you can then build those to higher levels of learning as you go through systems class and SIT/GFS _and_ show up prepared for sim.