well to be a secretary I think you have to know their computer systems, and be trained in them.
Any other job you probably need some type of certificate/degree, the best thing to do is to look on the hospitals job website and see what's open that you can do first.
I tried to find a job at a hospital for my school so I can go into the medical field eventually, with experience but everything requires a degree or certificate first, and I can't do that since I'm in school, all I can do is volunteer.