I'm still waiting to get into nursing school, so this is really for those who are in it already. I am interested in being a critical care or ER nurse. I realize you need extra training, but I am always afraid I'll get my first job as a floor nurse but not be able to jump on opportunities to get into the ER or ICU. Additionally, there are so many extra certifications. Is it relatively easy to navigate once you are in the hospital and not too difficult to get the specialty you want, or are there ways you can get "stuck" in a unit you don't want to stay in?