Hi Dexter!
Yes, if you want to start a book club, I would encourage you to post a thread on the forums, perhaps first seeing if others would want to join. The process generally follows the same processs as book clubs are run in the wanikani book clubs, however since we mostly only have one book club right now (mystery novel book club) we don’t have our own rigorous guidelines.
But yes, I think making a thread asking if anyone would like to join you in reading is the best bet. Or perhaps if you have a theme for the book club, you could get a few books proposed for that theme and then take a poll. 
