I started in oncology at a cancer hospital in new york city. it was a great experience and what i can share is that you should look to be paired with a preceptor who you are comfortable with... someone with good habits and safe practice who knows his or her stuff! When you're competent and safe you become confident and an expert professional. It is very overwhelming in the beginning, but you'll get the hang of it and be flying solo safely in no time. Check the hospital policy before you do something and look up anything you're unfamiliar with... Plus asked experienced nurses on the unit that you trust questions. You'll be surprised how happy it makes them to be asked... No matter what the stigmas are out there, most nurses do not want to eat their young... they want to see you succeed and patients receive excellent care... so if you're not sure about something ask! All the best!