My hospital has a critical care orientation class that is separate from regular hospital orientation. During the class, they have a skills lab set up. Believe me, it is much easier to zero an A line for the first time when there isn't a pt hooked to the other end LOL.
We were also able to practice shooting parameters with a Swan Ganz, and there was a vent with a glove on the end. It was neat to see how the different settings affected the lungs(glove). Is it possib;e for your hospital to set something like this up?
You might also ask for a longer orientation period. I would get some CCRN study books, too. These have lots of info that you need to know whne employed in a unit, regardless of whether you plan to take the exam.
Good luck to you! I ho[e you love working in critical care as much as I do