To copy the server IP, go to the Home page and click the Play Now button. You will then need to click on Java IP and copy the IP. The version and Port will also be stated.

Open Minecraft and on the main menu, click on the multiplayer option and press add server. You can name the server whatever you like, but you will paste ONLY the IP into the 2nd textbox.

You can now play the server however you like! Remember, there aren't that many rules!