[Coldsaturn]

World Underneath texts is where you'll properly start putting the pieces together. A lot of answers are also given in Death&Rebirth, but you need the WU texts before that because the new main chapter kinda takes it for granted that you have already gone through them.
The myths are there for you to go "ouch" every three canon lines your LI says. And for some (the ones who until proven otherwise actually remember past times - aka Xavier, Raf, Sylus) the myths are there to understand their actions, especially their initial behavior with MC at the beginning of the game.
It's absolutely okay if it's not clicking yet, there's a lot on the table right now and only some of it is starting to sort itself into a certain order of events.

You still have to reach the juicy juicy part of Lucid Dream! Go forth without fear, soldier.

Lol yeah I totally get that! I'm resisting taking 1000 screenshots just because I tell myself "I can always do it later" (and "I can see them on the forum" lmao)
Instead I fill my album with glint photos /facepalm