Do you have a fandom that you follow - either regularly or casually - with little to no knowledge of canon?:
Nope, although at one time I guess that I knew Sapphire and Steel only through fics. Now that I’ve watched all the episodes (and that reminds me, I should watch them again), that doesn’t count. I suppose I don’t know everything about Doctor Who’s canon, but is there anyone who does? At least I know that Frobisher was a companion ….