The Million Islands is a setting designed for tabletop roleplaying games. The focus is the Great Ring, a group of archipelagos that form a rough circle around the strange and perilous Middlesea.
In this world, story and belief shape reality. The power of collective belief creates gods, monsters, and heroes, and rules of narrative are as important as the laws of physics.
For those who like to explore the underpinnings of the world, the best place to start is here.
If you would rather start with something less all-encompassing than the universe, you could check out the world one region at a time. Each region has their own unique locations and cultures, and is suited to a different kind of game. This world is also a work in progress, and not all of the regions are equally well developed at this time.
If you'd rather get an idea of what kinds of characters you might play, looking at the available species is a good start. Here are the most common ones found in the Great Ring.
If you are more interested in exploring some of the characters in the world, you could start here.
And finally, if you just want to find something fun to read, you can look at the articles people have liked the most.
The world is constantly being updated and changed, so feel free to follow, if you are so inclined - I hope you all have fun!
If you like the world of the Million Islands, here are some other worlds you might also like.