I'd ask yourself what is it about nursing and health that interests you to make it your career. Don't be blinded by the images you've seen on TV as to what a nursing career is. Ask lots of specific questions so that you can learn what it is and what it can be. Do you handle stress well? I would encourage you to wait tables for six months while you are preparing yourself for further education because you will learn to multi-task and customer service skills. No joke.
I encourage you to look into the current employment needs for both registered nurses and medical assistants in your community to get a glimpse of potential opportunities available. You can do this by reading one of the online job posting sites. Decide if you would rather work in a clinic/office setting or in a hospital, nursing home, corrections (jail/prison), school, etc...because some of those areas may have more opportunities available as a RN. Most of the clinics/offices here hire MA's or LPN's rather than RN's. The local school board hires LPN's and RN's for school nurse positions where I live. If your goal is to work in a hospital then RN is the best choice. I live in a large metropolitan area with a variety of health services available, so your options might be varied from what I describe if you don't live in such a place.
Lastly, spend only what you can afford on your education. If you must borrow, then spend only what is necessary because the student loan debt will have to be paid back. You do not want to be saddled with high payments as you begin your professional life. If you default (don't pay them), you will lose your nursing license. So be smart with your time and your money no matter what career you choose. Best of luck to you!