CRAZYKI11ER925

me and my buddy were trying to get him to join my world. I did the open to LAN than open to Internet. when hes in the multiplayer menu he hits create server does it have to be my exact world name? and its just that ip when you hit escape do i have to wait for anything else? we tried 3 times eachtime his said couldnt find it(forgot the whole message) 4th time my ip address turned green and it still didnt connect. do i have to wait for it to go green everytiem? im sorry for this long post thank you for any help, first 3 times didnt have publicly shown 4th did