Career Path question

  1. I would eventually like to be a nurse on a cardio thoracic step down unit. I applied for the job (my first), but did not even get an interview.
    There is a job opening for a nurse at the ambulatory care center, but I am not sure if I should apply or wait for a general medical surgical position. How would a step down unit view experience in AC? Is it better or worse than a general floor?