Medical jobs???

So I know that I want to work I. The medical field but I do t know what I want to do. I feel like I have to experience it to see if I like it. For instance, I wanted to work at a vet clinic and hated it once I got in. So now I just want to be sure. I had orientation for my now job at a hospital today and heard a lot of cool jobs from other people also joining the hospital. Psych nurse, social work, cancer nurse.... I need more ideas. I really need to pick a college major soon