First of all, I salute you. Nowadays, few of us who study Chinese medicine stick to the classics. As long as you are willing to work hard, you will certainly get something. I recommend several works. Needless to say, Huangdi Neijing must be mastered. Traditional Chinese medicine must recite Treatise on Febrile Diseases, Introduction to Pulse Diagnosis, Near-Lake Pulse, Traditional Chinese Medicine, Medicinal Properties and Prescriptions. Reciting classics does not mean mastering the theory of TCM, but reciting classics can increase the foundation of TCM, and it is very helpful to understand some principles of TCM on this basis. The above is my humble opinion, I hope it will help you.