Here is a quick progress tracker for the full game.
As you can see its huge.
The game will take 2.5-3 years in Early Access to complete, and I wanted to post this for full transparency, and also to show that everything is actually planned out.
This will be updated each time a chapter is complete, currently I'm third of the way through chapter 3.
Early Access should arrive once chapter 4 is complete at the earliest, but I might wait until chapter 6.
All progress can be freely observed in the official discord server.
https://discord.gg/FXUhjdXZkr