TCM has been curing patients for several thousands of years, so it is difficult to sumarize it ! it based on a perception of human body and mind quite different of occidental medicine. We are not different parts assembled together, we are a whole connected with the universe.
http://acupuncture.com/
Shiatsu is a practice derived from TMC where the practitioner is using his thumbs instead of needles. You cannot learn Shiatsu online, you have to look for a teacher .
Dc Maciocia, who is located in US, has written a book about mental illnesses and TCM :
https://www.amazon.fr/Psyche-Chinese-Medicine-Disharmonies-Acupuncture/dp/0702029882
which is oriented for professionnal.