If you do not feel that you can change bedpans or deal with condescending doctors then do not change careers. Speaking from someone for whom nursing is a second career, one of the most important things to remember is that it is a new career, and, while some of the skills from your previous profession will transfer, you will know less initially than a 22 year old with one year of RN experience, which can be challenging to internalize, as you are used to being more than proficient. So expect to be very, very humble, as the learning curve is steep.