I`m glad you asked about Iching (Yijing), it doesnt get discussed that much in these forums.
When it comes to most chinese divition methods, due to its incredibly long history a lot ?changes? it has gone through.
For example the traditional way to cast Iching is by yarrow stalks among some other tools, however nowadays using coins to cast Iching is a widely widelyy accepted method too.
To start out in Iching, I reccomend deciding which method you`ll like to use and start casting :)
nowadays thhere are books where the meaning of the hexagrams are written clearly for you. But if you would like a more indepth understanding of Iching, you should read the actual Iching.
Iching was originally a sacred book which people called the book of changes, I believe there are a few translated versions floating around the internet.
If you have questions, feel free to ask me.