OMG... I made this club.... I have no idea how to put picture as the banner یا icon... If anyone knows PLZ TELL ME!

Under the banner in the far right corner is a little ترمیم button. Click that and then once it arrives to the page you'll see where :3

I agree with the other answer but here's something else that might be useful: If you're having trouble finding a banner, in google.com type in Phineas and Ferb banners. :)