Study with Mimi Guarneri, founder of the Scripps Center for Integrative Medicine: Dr. Guarneri's Website. I recommend taking her course from Great Courses: The Science of Natural Healing. It is a great way to begin! 24 half-hour lectures.

Another great source is Quantum University, offering degrees online in Holistic, Natural, and Integrative Medicine: Quantum University link. The courses are by people like Dr. Bruce Lipton, Dr. Amit Goswami, and Dr. Joe Dispensa, all well-known authors in the field. They also have fantastic seminars in Hawaii!

Bastyr University (just above Seattle Washington & in San Diego) offers the premier in-class Natural Health Education. Bastyr Univ. Link