Install a TasteTheSno Jujutsu Kaisen x Fantasy World server through the Control Panel (Servers → Select your server → Game servers → Add Game Server → TasteTheSno Jujutsu Kaisen x Fantasy World)
Very respectable experience, obviously getting into making servers for your friends isn't easy but this website has made it as easy as it could me, the guys absolutely love what we've been able to do using the servers here.