Some of the questions you’ve asked you should be able to figure out yourself pretty easily.
As for adding your PC, add the IP address. When you add a host, you’ll see a message along the lines of “Your current computer is: xxx.xxx.xxx.xxx”. Use that IP.
Rest of the info is obvious; Server name, that’s the hostname. Port, leave that default. Username, the username you created. Password, the password. Schema would be the database.