Cod mw multiplayer


Hi friends, I've just installed call of duty modern warfare multiplayer as this is my first time to playing MW multiplayer, there are two option 1: join 2:server something like that, can you people please teach me how to play it i clicked on the second option from the main menu which contains many different options like server name, punk buster, maximum players and many more so i'm completely NOOB at this level. What should i do further?