Right now you're in class so focus on class, worry about the other stuff after you've passed the NREMT and gotten on somewhere. Some people will say that there is a major difference between what is taught in "the book" and what you need to know "in the streets", these people are mistaken. The book does operate under ideal circumstances but don't be that guy who blows off the classroom instruction and dumb stuff because you'll never need it or you'll do it diffirently. For now focus on getting through the class, there are lots of things about being an EMT that you can't learn in class but while you've got the time focus on the book learning. If you learn enough about what connects to what and does what you can better diagnose what's going on with a patient in the future. I also recommend EMTprep.com, especially their youtube videos on the NREMT practical skills, those really helped me.
And always remember "BSI, scene safety"