I took an EMT-P class while in undergrad and did not have a problem, even though I took difficult classes. My class was 2 nights a week and 1 or 2 sat. a month depending on what material you are studying. It is very hard to balance the time required to maintain good grades in undergrad while also learning the material for the medic class, however if you are good, you can do it. Like the previous post said, there are significant clinical hours that must be done once the class is over and finding time to do those can be as hard as finding time to study. However, in NC there are not certain types of calls you must run, but there are certain skills you must complete during the internship and ER clinical.
If I had to do it over again I probably would not have taken the class even though i enjoyed learning the material due to the lack of free time you are left with while enrolled in the course (that was the only drawback, no bad grades, etc.). If this doesn't bother you, take the class and have fun learning the material, but if you begin to have problems with studying for undergrad classes, don't take the EMT-P class.
Also will you be a freshman in college?