How can I expand content area? Can Someone Please help?

I'd like to widen the 'white' content area for my site. I've reduced the sidebar a little bit but there is just too much padding either side of the actual content on the home page.

I'm not a coder in any way but I'm pretty brave.

http://www.dreamcatchermarketing.com.au/devsite so you can see what I'm talking about. Cheers from Australia, hope you can give me a clue