Volunteer in Hospitals

Hello
I'm in school now and will be receiving my certificate next Spring but I have no experience in medical/health field. I see experience is as important as education so I would like to know how is it volunteering. I'm a little nervous about it, I don't know why. I'm 25 and I was thinking maybe the usual volunteers were older than I, like retirees.

I have read that volunteers were treated like dirt, disrespected, and the work the paid workers don't want to do, the volunteers are forced to do. I want to volunteer to learn how the hospital is and if its really for me but I hope I won't be looked as beneath anyone. Are volunteers asked to do things that usually only an experienced person would do?

I live in Flint, I have Hurley and McLaren to chose from to volunteer. I don't know if I will volunteer at both or chose one. Which hospital would be better to volunteer?

I also like to ask has there been cases that volunteers have been hired? I know every volunteer can't be hired but has there been instances of volunteers who were hired. Thanks