[@Stitches] Pretty much everything in Fallen London is canon in this roleplay. However, you aren't required to know everything about Fallen London to join this roleplay. The stuff on the front page is basically the minimum of what you need to know about the story in order to join- knowing more about the canon is beneficial, and could help add depth to your character and their history, but you can still join without that extensive knowledge. Does that make sense? 

EDIT: Vit phrased it much better than I could, haha.