I'd like to make changes to Milk 2.0

I’m looking to make some minor changes to milk 2.0 and I’m not sure where to begin.
I’d like to add a background like http://mess-hall.co.uk and make the theme kind of the same width, but Milk’s font’s are a little too big for it all to fit comfortably.

WIP is http://mess-hall.co.uk/NEW

Many thanks,

Hey Darron, contacting the author of the respective item for advice, would be a good first step, if it’s not covered in the documentation. Additionally, searching through the item comments might prove useful, just in case anyone has had a similar question that’s already received a reply. Cheers