When getting started, we should first understand the characteristics of heavenly stems and earthly branches and the simple principle of five elements restraint; You can refer to Four-Pillar Foresight written by Shao Weihua, Introduction to Four-Pillar Foresight written by Chen Yuan, or relevant basic books written by Shao Weizhong, Li Shunxiang and Li Hongcheng.
After you have learned some basic knowledge, you will begin to practice simple forecasting methods. At this time, it is best to refer to some ancient theoretical books, such as Yuan Hai Zi Ping, San Hui, Poor Jian, Mu and other classic works.