Hello to all ,

I have been pulling my hair for the past 2 hours I can't figure out how to get funds from my bank account into bitcoins. I need to send the funds to a seller, but don't know how  . Please can someone tell me the easiest way to do this . I signed up at bitcoin7 , but can't figure the site out . Is there something else I can use that's easier that you can recommend ? Is there any steps I am missing ? Please all help would be greatly appreciated

Thank You