Plutonium

ReflexOnYT doesn't matter, nat loopback will only prevent you from seeing the server that is running on your network. You can still join manually via ip using the console.
If you run server and game on the same pc you need to start the game first and then start the server. The server will then use port 4977 which is the port you need to forward via your router's web interface.
Idk what you mean by "all my ip's are private".