I can’t speak on much because I’m still a mere scrub here; but maboi @MagusVerborum gave me a great tip on how he’s been doing it for our video series, in addition to what Aspi said; try ask questions relevant to what you were thinking when you read through the stories. You can lead them in new directions, mislead them ever so slightly and it gives you an opportunity to think on why you came to those conclusions in the first place. 
Once you’ve read through any story, or played any game, it can be hard to go back to the beginning, but often the most fun when playing with new people is to go make a level zero character and play through that RPG with your buddies, rather than joining them on your all-powerful max-level fashionista character.