Hello, I have been in Oncology for 7 years and I have worked as a floor nurse, outpatient large cancer center, community cancer center and private physician cancer center. I love it all. If you are going to be working on a Oncology floor then be ready to give lots of blood. Most chemotherapy can be given in outpatient locations, but highly toxic and bone marrow transplant patients usually receive chemotherapy in the hospital.
For any new graduate, just remember to give yourself time to learn. I chose my first job at UCLA because the nurse manager told me that I wouldn't really feel comfortable until a year and then wouldn't really get it until 2 years. Of course, I didn't understand because many facilities only give you 2-8 weeks orientation. I was told I would get a minimum of 12 (no shortcuts) and could get an additional 4 if I needed, plus I attended a new grad class once a month for a year. I received the 12 weeks of orientation and then I constantly asked questions because my first job was on a liver transplant floor and had very specific drug, labs, and tasks. I was lucky and had many coworkers who liked the fact that I wasn't afraid to ask questions, and readily could admit was I didn't know or understand.
Usually oncology floors have good orientation because the role involves chemotherapy and lots of immune suppressed patients. The best thing that worked for me was for me to know what I didn't know and not be afraid to ask or research until I fully understood. If you find a nurse who you feel is very knowledgeable and provide great care (doesn't have to be your preceptor) then ask them if they would be willing to be your mentor after your orientation (if its not your preceptor that you ask). Best of luck to you.