Help with Devotion system

I’m still trying to figure out this Devotion system. I’ve read through the game guide but all I saw was just the one paragraph intro. I also found this sticky of constellations by bonuses helpful. Can someone help me out with some more information to put it all together? Primarily, I’m trying to figure out how the colored markers work together with the different constellation bonuses.

Just found the actual devotion section of the game guide. I’ll read through it, but I’ll still take any advice on the subject.