Blue Skies
To get started in Blue Skies, you must find the Gatekeeper in the Overworld. His house generates in plains, snowy, and mountainous biomes. He'll trade a Blue Journal and a Zeal Lighter to get you started on your journey. The Blue Journal is an essential guide to the Everbright and the Everdawn as it effectively is the wiki for this mod in game. The Zeal Lighter will be used to light the abandoned portal on his property. The portal you find has a 50/50 chance of being either the Everbright or Everdawn portal. If you want a different portal, you'll need to find another of his houses and hope you get lucky. There are methods within each dimension to obtain the required stone to make a portal to the other.