I want to learn divination to count auspicious days, how to learn what books to read, where to learn the basics, and how to understand the jade sagger.

Study? It takes a long time … but you can see some simple things … you can do anything in Dont Ask For Help! If you want to make a living, you have to learn something more advanced ... As for the Book of Changes, I don't think it is necessary. Fortune-telling is just a small branch derived from the Book of Changes! I can't even read the branches, let alone the Book of Changes!