I did the following and it worked for me;
The deck; pored lovingly over it, just looked at it and got swept up in the geometry and composition of each card.
Then I read DuQuette's "Understanding &c" book. Took notes. I thought I might never read Crowley's Book of the Thoth as it sounded so
scarey.
Then I read
Snuffin's book, which complements DuQuette's perfectly.
Then I thought I could perhaps face Crowley's Book of Thoth if I took it slowly, girded my loins and went for it, thinking I would understand nothing. but - hey! - I found it very enlightening and could mostly follow it, even if there was a lot of info I couldn't take on board. I could follow where it was going and what the arguments were.
You won't need anything more than these three books. Maybe later the Book of Law if you get really advanced.
My advice; get yourself a decent sized notebook and
take notes. There is a lot to remember and you'll find your musings and reflections and factual stuff will quickly get overwhelming if you don't write it down. My Crowley notebook is a rambling work in progress. Over Easter I had to get a bigger one and copy everything out and start a new notebook! It was getting very out of hand...