If you can extract the content from your (existing) site, just the text and images, it shouldn’t be too difficult to drop it into RW. As Rob says, try the demo. You may be surprised by the extent to which you can customize appearance - all, effectively, by changes to the CSS, which is what underlies RW’s Themes.
One of RW’s greatest strengths is the 1,000+ add ons which do most of the hard work for you while at the same time being very customizable
This set of examples ought to impress!