I just finished EMT school at a program called Roxell EMT, and it was a nice program but it's very different from a college setting. A friend of mine went to lone star college EMT and he is way ahead of us. We weren't really hands on in our program, and the majority of the machines were broken. I definitely recommend going to lone star college route, they teach you A to Z. You will have the book knowledge and the hands on, so when you are done you are ready to work.

Honestly just he basics of anatomy and physiology like where major bones and organs in your body for example femur, liver, nothing too crazy. Since you have some time, i will definitely get a head start on medical terminology, that's is the backbone of school and ems in my opinion. Second would be knowing and memorizing vital signs, blood pressure, blood glucose level, pulse rate, respiratory rate. And as a bonus, I would print out the NREMT Patient Assessment Skill sheets and start to look over them, just to get familiar with it. You don't have to memorize the steps right now but just get familiar with it. Hope this helps