Where to Begin

I've been reading through the forum and have learned a lot and I was wondering if anyone could possibly send me in the right direction. I'm applying to UC Davis Medical Center and these are the available areas I could start in as a new graduate: Accelerated Access Unit, Ortho/Trauma, Peds ICU/Peds Special Care, Neuroscience, Surgical Unit, Burn Unit, Cardiology Services, Cardiothoracic Step Down. Now if I'm accepted I'm thinking that either the Cardio Step Down or the PICU is a good place to start but does it matter between the two? I would appreciate any help that you could give me. Thanks for your time.