I would suggest doing the hardest job first, everything from there is bound to get easier, ( or better ?!?!?). Start in the most challenging field, for you it might be your most high anxiety, or the field you feel the least comfortable in. Seven patients on a Med-Surg floor, four Peds, five O/B patients, five on telemetry, then work your way to L/D, ER, ICU, NICU, where the patients are less in numbers, but require more specialized care. If you can do the basics, you can do the special stuff. I find, it is better that way. However, if you start specialized, you might not get to experience the basics, or may be intimidated/ not so sure of yourself, if you do ever have to work one of the areas. Only a suggestion, and I do never think any job is "harder" than the other, just different. I feel though on a floor such as cardiac, med surg, ob, you can learn alot of different diagnosis, and treatments to get the best experience possible. It's what I did.. and I can work anywhere! It is trully a challenging experience.