There are quite a few options to pursue a career in medicine that does not have to do with getting your medical degree (medical school, M.D).
Some options you have are becoming a medical assistant, a nurse, nutritionist/dietitian, physical therapist, radiology technician, speech therapist, behavioral therapist, occupational therapy (helping patients with day to day things when they are injured or disabled).
The least amount of schooling from these options is becoming a medical assistant which involves a lot of administration work as well as helping doctors with giving vaccines, patient education, and taking their vitals., o
Many nutritionists/dietitian have a master's degree. Finally, special programs exist to get a 2-4 year degree with physical therapist and radiology technician, occupational therapist.
Hope this helps!