taboo

I just wanted a little bit of advise before I make this big change. I have worked for a medical equipment company for five years and have been the manager for three years. I am also a board certified orthotic fitter and mastectomy fitter. I deal with doctors and nurses on a day to day bases and I have alot of knowlege about medical equipment and devices for patients. We do everything from orthotic bracing, mastectomy fittings, diabetic shoes, oxygen, cpap equipment, and colostomy supplies. I have found in my years of employment in this field that I have grown to love my mastectomy patients the most and in the meantime I have become burned out on the retail side of the buisness. I just want hands on patient care!!! I have decided to go back to school and pursue my RN and I know this may sound silly but I want to specialize in oncology right out of school and hopefully work in a breast care center. I know this is alot to demand but I know I can do it and I am asking if anyone can give me any advise for what I am up against or what to expect i would appreciate it.