The health field offers technician careers in rehabilitation therapies, mental health, emergency medical services, veterinary medicine, pharmacy, medical records (health information), laboratory services and general practice as a medical assistant.
The Bureau of Labor Statistics website offers descriptions of technical jobs in each of the above mentioned areas. Volunteering with a technologist in any area of interest will give you the best exposure to what a particular job entails.
Most health-technician jobs require an associate's or bachelor's degree or certification. Some foundational coursework such as medical terminology and basic sciences may be accomplished through distance (online) learning; however most health-technician degrees require clinical training that can only be accomplished on site.