Overarching storyline

Is there a summary or post that goes over how all the boys are connected to MC, their back stories and how their myths are connected to the main story plot? I’m a newbie and just started chapter 8. Everything with Xavier is confusing, Raf just had his big reveal and I keep seeing Zayne as some snow prince???

I’m assuming the memories are just various dates within the timeline?

Spoil me, please!