Unfortunately there's no Study Group for the deck, but that doesn't stop you from starting one. The guidelines for doing so are
here.
I have the deck but haven't used it. I just took a quick look through the LWB and see that it doesn't describe the imagery at all and only talks about the interpretations for the cards and gives some exercises. So I would suggest you start with describing what you see and figuring out what that means to you.
Take the Fool for example. What does his shirt of leaves mean to you? How about the multi-colored stockings/jester shoes? Do you make anything of the fact this his hair mirrors his stockings/footwear? He has stars at the end of his plaits. What does that mean? And do those stars mean something different than the stars of a different color that he appears to be releasing from each hand? What is the strange creature behind his left leg? What does the flower on the long cut stem mean to you? And what about the three apples encased in the orbs behind him?
There are no wrong answers.
You might also consider joining the Intuitive Study Group (ISG) exchanges over in the
Reading Circles forum. This is the perfect deck for doing intuitive readings with.
HTH,
Rodney