How do you make make an icon/wallpaper for a club you made? I have the pics I'm going to use, I just don't know how to MAKE them the icon/wallpaper!

For an icon, you just crop and resize the image you've chosen until it's something like 100px-100px or 200px-200px. I use lunapic to do this. I'm sure there are other methods though. Even using Paint if you've enough patience.

I can't really give much advice on creating wallpapers. Whenever I've tried, fanpop has said they're too small and put them in fanart or photos - even when my computer says they're 600px-800px or larger (that's the minimum size)

link