How to make multi-placed customzation system

I’m working on Left behind, and it has PvP mode and the PvP mode has ruddev’s main menu and I’ve tried to reconfigure it to a only skin customization, and it got me stuck… And I was trying to get something easier to configure but didn’t find anything,
It is meant:

  1. Ony skins/bundles
    2.Customization server and game are separed
    3.A shop system…
    please help ;-;