Wrestling is so fun for newer fans but especially newer elite fans cause like, almost every other wrestler you can just go watch some documentaries or fan-made videos of their top ten matches/storylines whatever
But for Elite Fans the only handbook you need is a 300+ episode YouTube show that encapsulates all of the most important lore you need to know in order to understand why they are the way they are :)
Kenny Omega said that he thinks Roman Reigns is incredible and he's jealous of Roman because he is "presented as the same exact way that I would love to be presented. He's presented as the man who's the Champion to have big matches. He's getting to do what I did in New Japan."