Originally posted by Bansheedragon:

You can both host and play a game on your own computer and it's quite easy to do.

This is how the menu looks when you start and continue a game.
https://steamcommunity.com/sharedfiles/filedetails/?id=2910685661
To host a game for you and your friends, simply check the "Start Server" button when you start a new or continue a game, and in the grey field at the bottom you input whatever password you want on your server.

Note: If you have the game on Steam and any of your friends have the game on Windows Store, Game Pass or some other platform, you need to check the "Crossplay" button as well for them to be able to join you, this will require you to add a password.

Then all you have to do is click Start and once you are ingame your friends can join.

It should look like this when you are ready to start.
https://steamcommunity.com/sharedfiles/filedetails/?id=2910697194
I hope this helps.