My son has done one simple mod so far so has that start point
Is the mod on github? Just curious as to his experience. There is no need for a GUI if you follow dabo's suggestion.
Might also be possible to use the Server_GameCustomMessage hook to have it happen in the beginning as well.
Not a mod I would recommend as a first-time mod. But, if he can code it should be possible.
Edited 2/19/2020 14:30:33