After a lot of headaches I've managed to edit the game files and create new land in Kenshi.

This mod includes:

 - A new island with little to no threats far away from civilization
 - A new area called Mykonos with a curious skeleton dialogue and a first arrival dialogue
 - Two game starts. One testing start with three OP characters already in the island.
                                    A more adventure-style start in Port South, with a mid-game character and a bunch of cats.

ALERT: THE ISLAND IS CLOSE TO PORT SOUTH

This mod basically adds a new island in Kenshi with little to no threats and terrain able to grow any crop, having abundant resources.

Water - 100%

Arid - 100%
Swamp - 100%
Green - 100%

Copper - 100%
Iron - 100%
Stone - 100%
Wind - Little wind (seasonal)

This is my first mod and I tried to make it as complete as possible, as the idea of a lone land far away from the wasteland was interesting to me. It is aimed for a chill experience, expect no challenge here. This island is full of animals too:

Leviathans
Garru herds
Bull herds
Wild goat herds

I tried to make the terrain green and put foliage, but it seems there is no way to change or at least I don't know how to do it. If someone manages to do it, contact me and I will inmediately update the mod so the island doesn't look like a desert :)

Thank you.