Good for you that you want to work and get some experience!
I highly recommend working while in nursing school, I did it for my last 3 semesters and dont regret a second of it.
I do recommend working PRN though, as you can choose your hours, and this way you arent scheduled to work 3-11 the night before a big test.
I learned so much working while in nursing school, and I think it helped me to become a better nurse. They cant really teach time management in school with one patient, but as an aide, where there are 15 patients for you to do vitals on, you learn time management quickly. Its also a chance for you to practice your nursing skills: heart sounds, breath sounds, etc.
I always did my 'assessment' on each patient when i did vitals, then the nurse would do theirs when they went in.
I wish you the best of luck in this, and as an added bonus, working at a facility gets your foot in the door if you decide to work there after graduation.