I have been an ER nurse for just under one year now. Before that I work in Corrections and as a School Nurse for MR/DD. You need to sign up for A.C.L.S. (Advanced Cardiac Life Support), P.A.L.S. (Pediatric Advanced Life Support), and any other emergency type classes you can take. I was in "first-degree" shock for about my first 3 months. I felt like I did not know anything about this type of nursing. I am still learning, everyday something new arises. I guess that is why I LOVE Emergency Nursing. I started out in a very small rural hospital ER and now went to a little bigger one. Things are much busier, but still great. Good Luck to you. And remember, just go for it!!