If you decide that's what you want to do, and prioritize it over what you're doing with free time right now, it's absolutely doable. I don't know what else you're going to school for, but EMT class is not all that challenging academically. If you set your mind to it, and carve out time to study outside of class, it shouldn't be a problem. 22 hours a week if I still remember how to do math? When I went to EMT school that in itself was 32 hours a week, and it was an accelerated class. But it goes to show this can absolutely be done.