[2020] Unturned Dedicated Server Tool

How are you supposed to use the unturned server tool? I had found out how to configure and make the server itself with it and i have port-forwarded, but it says defaulting to lan and i dont know how to make it an online server that me and my friends can play on. Does anyone know how to fix it and make it so my friends can join in from their own homes? That would be really helpful if someone could tell me just how to make it an online server instead of lan. And i dont know why there are no tutorials for this already :/