Campaign Primer: The 3-Dragon Problem
In order to give my player's a starting point into the upcoming game, I put together a campaign primer and turned it into a .pdf file. Covers most of the basics, the world, races, classes, factions, gods, etc... Here, I'll just share it with you and you can check it out.
The world is an alternate earth. The gods are pulled straight from Mythic Odysseys of Theros. Most of the rules are straight up D&D 5e, with some tweaks. It's what I gave them and what they had to work with.