ya its kinda plain, for the bakround u could make it a grey/whitish color maby using the gradient tool with some beige colors whill be good to. i suggest you blend the render if you are going with something like that, you can google for some good tutorials on blending if you dont know how.
what i understand your new to photoshop, so brushing whould probebly be the way to go. if you dont have any good brushes i suggest you downlouad some,
http://www.deviantart.com is a good site for all kind of stuff concerning photoshop. you could try to mess around with the filters. well good luck
