Please help. I recently entered the healthcare industry at the age of 40. Background in banking and travel. Became a CNA to see if healthcare is something I wanted to pursue further. I do. I would like to become a RN. Do I have to take pre-requisite courses or can I apply to nursing school as a mature student? I have some college/university business courses. No degree. Please advise. I'd appreciate any help I can get. Thank you