Can someone help me with making a server?

My content is downloaded and ports are forwarded. I need to set up an IP adress that isn’t LAN so people besides me can join. Please help!

You shouldn’t need to set up one if you’re connected to the internet. Use a site like www.whatsmyip.org to find it.

I get the error "Couldn’t allocate any server IP port. What’s wrong?

Bump, please.