Nope i'm Dutch/Belgium. And although i've read some books about Native Americans its not a subject i studied. ( mostly Karl May when i was little ;-) )
But i think you would not need much background for this deck. Its clean ,clear and rather earthy. I can relate to it very well even if i'm European.
The LWB explains some but most is rather self explanatory.
I think the biggest learning curve for most people would be that its Toth based instead of RWS.
I gather that your not american either? Did you have some trouble relating to decks that were american in nature? I've been eyeing the pairie tarot from Robin Ator but put of buying because i'm worried i can't relate.
To be honest, the Ator or Prairie decks are not decks I can relate to (and no, I'm not American either). Sometimes a deck is done in such a way that makes it universal, other times what we think of as our "grasp" of a culture is superficial and insulting. Sometimes there will always be something niggling that reminds me I won't ever truly get inside a deck because of its references. It is easy to think of decks as "universal", or that we ourselves should indeed, in a globalised world, be universal. But I don't feel it. Like the New Orleans Voodoo Tarot. To be honest, I may study and read the book but I'll never truly grasp the complexities unless I feel somehow initiated into it. The book takes itself
very seriously and constantly reminds us of the fact. If I bought the Vision Quest it would be the only Native American deck in my collection. I wouldn't know where to start to be honest.
But I do think tarot is very good at offering us titbits and rashly drawn morsels of other cultures and making us feel we "understand" (that we have "insight" into other cultures, that we are all "shamans") and I'm not saying that as a compliment!