A quick and easy way to start, if you have generic mod and have not altered it, duplicate the folder and mod files, rename it. [If you edited Generic Mod and it’s gone, or changed, verify your installation and it will be reverted to original]
open the GenericMod level file [the orange one that says level, double click it]
click window -> WorldSettings
Change the Primal Game Data Override to your Primal Game Data file [yes it HAS to have primal game data in the name]
Change the Force Load Map Name to TheIsland
Change GameMode Override to your GameMode file
Double click your PrimalGameData Change the name to something, add a description.
And change the GameMode in your file to your game mode.
SAVE ALL [do this, seriously do this, if anything has an asterisk it means your changes are not committed to file and will be ignored by the cooking process, they may not even be written to file]
SAVE ALL [yea do it again, paranoia is healthy… just do it]
Cook & Upload.
You will be able to see it as a mod, and you will be able to load it, if the name is changed to yours, and the description you didn’t miss a step, now go add stuff to it.
Once you know you are doing it right, change the TestMap Levels world settings to your PrimalGameData and GameMode and test it all in editor [but editor will let you do more then the game will it doesn’t have true error checking]