What part time job would you recommend to a 18yr old who is interested health or medicine?

Unit clerk or Asst. Many hospitals will employ high school kids or college students as unit clerks on an inpatient unit or nurses aids on the unit or in the emergency room. Qualifications are usually something you can acquire over a short training period. Exposure to a variety of clinical settings may influence your ideas. Some large clinics may offer similar paid or volunteer positions.