RN, NP, OT, or PA?

[medapop, BSN, RN]

I'm going to be a sophomore in college next semester and I can't decide between becoming a registered nurse, nurse practitioner, occupational therapist, or physician assistant. I'm a very organized person and I want a career where I feel like I'm actually making a difference and accomplishing something. I also would like a job where I'm kept busy and never just sitting there with nothing to do. I don't know which one would be the best for me out of the four. Any advice would be great!