How do you study hermetic qabalah?

There are lots of people willing to take your money to tell you things which are not true about the Sephiroth, the Ain Sof, and Enochian grammar. Why not look in your local phonebook.

Alternatively you could begin with a book such as Keith Thomas Religion and the Decline of Magic, or Desirée Hirst's Hidden Riches - which well tell you things which are at least partly true.

You should probably start with Desirée's book, you sound like a neophyte.