From what I tried the art doesn't quite work, at least from a procedural generation standpoint. I had to adjust the art assets to make it fully automatic. I was using a bunch of this as a reference https://michagamedev.wordpress.com/2018/02/24/181/
Even if you're not using Godot, the high level "this is how bitmaps and autotiling works" helps immensely.
I gave each biome its own tileset and just stacked them all on top of each other.