I study the Book of Changes and plan to buy some books on Taobao, including The Original Meaning of the Book of Changes written by Zhou Yizhu and The Interpretation of the Book of Changes written by Bo Peirong.
Originally, you still need it. You can download an e-book online. There is an app called Yijing Reader on the mobile phone, which is quite easy to use and can also take notes. Is that the author hasn't updated it for a long time. These two books are a little difficult to get started and not advanced enough. Zhu Yi's position is quite high. In my opinion, it's a bit like Marx's productism. Teacher Fu Peirong's is quite good, and it's a little divergent. Many books on Zhouyi are like this, but it is not easy to get started.
The Book of Changes is not that difficult, but it is really difficult to understand everything. At the same time, congratulations on your choice of first-class knowledge, and I hope you can achieve something.