Launching the server to the network

What do I need to do to start the server on my PC?
The local server is already configured. There is a static IP. Ports are open via firewall and router (although I’m not sure about the router).
A friend was never able to join my server. I threw off ip4 and different ports to him: 30120 30110 40120 40110

Here is a server set up guide from fivem.net Setting up a server - Cfx.re Docs (fivem.net)

If you’ve already done all that , all you have to do is start the FXServer.exe and whatever ip and port you gave in your server.cfg , go to open your fivem software and press f8 then type connect youripfromsvr.cfg:yourportfromsvr.cfg

Thank you, it really helped. Now another question is how to make sure that my server is not seen in the list of servers?

Read this article https://cubes.host/client/knowledgebase/63/Why-is-my-FiveM-server-not-listed.html

I deleted the server cache. The errors are gone, but now a different error: “Host iы unreachable”