Everyone who is anyone already knows every single minute detail of everything in the Star Wars Universe, and some know everything about the Expanded Universe, yes that's a thing they can't retcon that because too many people are in on it, we create the EU it's entirely out of the hands of the original creator now, it's a self-learning artificial intelligence that will grow exponentially and take over all other fandom made universes.
Your homework assignment, should you choose to accept it, is watch the entire fvcking thing in chronological order...
Episode I: The Phantom Menace (1999)
Episode II: Attack of the Clones (2002)
Star Wars: The Clone Wars (2008-2020)
Episode III: Revenge of the Sith (2005)
Solo: A Star Wars Story (2018)
Star Wars Rebels (2014-2018)
Rogue One (2016)
Episode IV: A New Hope (1977)
Episode V: The Empire Strikes Back (1980)
Episode VI: Return of the Jedi (1983)
The Mandalorian (2019-present)
Star Wars: Resistance (2018-2020)
Episode VII: The Force Awakens (2015)
Episode VIII: The Last Jedi (2017)
Episode IX: The Rise of Skywalker (2019)