I would definitely recommend getting involved in some type of skill building experience whether that be in a clinical, research, or volunteer setting. It's helpful to gain any sort of "in" that you have access to in the healthcare industry. You could work as a medical receptionist or a scribe at a practice and volunteer at a hospital or at a nonprofit organization. There are also plenty of high-school summer internship programs that offer research or healthcare experience that can really benefit you in your application process. If you have other questions I can help direct you to places to look/apply for these type of roles!