To make the banner आप click संपादन करे and then there will be an option to add a picture and a banner. I usually just find a picture that fits the banner instead of taking a bunch of चित्रो and making one. But its your choice.
Oh I don't think that's an option आप just have to find a banner that fits perfectly. But a really great trick is say your club is a movie (example: तारा, स्टार Wars या something) आप could go to गूगल and type in तारा, स्टार Wars Banner and तस्वीरें would दिखाना up. It worked for me.