It's not difficult to learn. Just learn some basic theories of TCM by yourself, and then learn some health knowledge by yourself. It is suggested to choose the teaching materials of Basic Theory of Traditional Chinese Medicine and Health Preservation of Traditional Chinese Medicine in regular Chinese medicine colleges for self-study, or choose the teaching materials of Basic Theory of Traditional Chinese Medicine in Advanced Series of Traditional Chinese Medicine for self-study. These books are authoritative books edited and revised by Chinese medicine masters. Don't trust a book written by one person or a book compiled by one person, unless you have a certain understanding of the current Chinese medicine masters, choose their books. In the process of learning, if there is something you don't understand, look up the information and use the internet to find the information.