Have you called your local hospital and asked about volunteering? Perhaps call your police or fire non-emergency number and ask if they know of EMT certification classes in your area.
Edited to add: Those in themselves won’t be the tip for the T20s. However, simply getting started on a path can open the doors to more opportunities with more responsibilities.
Also, talk to some upper classmen who are doing those things you would like to do and ask how they got into those jobs or volunteer spots.