I have read some books of Zhouyi, all of which are characters, hexagrams, images and words, but I want to know how to divine, and many of them are silent books.

Find some basic books first. For example, Liu Dajun, a professor at Shandong University, wrote The Compilation. For more information, please refer to his Introduction to Zhouyi. Many stories circulating in the market are informal and easy to learn. With the foundation, you can choose to talk about six ideas in detail. For example, China Zhouyi Society (the only registered book in China) has a very professional book by Mr. Zhang Yansheng.