I was in your position a while back - I wanted to get down and dirty in trauma critical care nursing but didn't feel quite prepared enough. I asked a nursing instructor for advice; her opinion was to start out in critical access nursing and see if stabilizing critical patients appealed to me. To echo icuRNmaggie, working critical access means you are all things to your patients. I've had the exciting privilege of filling the roles of an ER, ICU, Med-Surg, and comfort-care nurse simultaneously in a single shift. It gets crazy when you also have to be the phlebotomist, respiratory therapist, physical therapy assistant, front-office receptionist, and security guard while also trying to execute your nursing duties! I'm fortunate enough to work with seasoned nurses who have my back, are ready and willing to teach, and incredible physicians who take the time to teach next-level pathophysiology.
At the end of the day, working at a critical access hospital makes you think like an ICU nurse, work like a Med-Surg nurse, act like an ER nurse, and gives you the opportunity to feel the pressure of caring for a critical patient and doing what you can while the on-call physician is a still a full 20 minutes away. I honestly think that critical care nursing is one of the best spring-boards for transitioning to any nursing specialty later on (like ruralnurse84 said, provided the other nurses are willing to teach). I've taken icuRNmaggie's advice, gotten my ACLS/PALS/TNCC and am currently working on ENPC and CEN in preparation to transition to a trauma center. Best of luck to you in your career as an RN!