Bonnie, welcome to WJ! And I apologize for missing this post until now. Some things just slip by me on the busier days.
It sounds like you already have the key ingredient for enhancing your library's web presence --that 'I can do it' attitude. You might get some ideas from the [url http://webjunction.org/forums/click.jspa?searchID=8357&messageID=27187 ]Web Site re-vision[/url] topic in another forum. Or you might want to jump into that conversation and see if you get a response.
I'm still on a learning curve with all this Web development stuff, but I enjoy the ride. I've found the tech books from [url http://www.sitepoint.com/books/cssant1/about.php?SID=85d766ac2abe935dcc6103613fc9cd63 ]SitePoint[/url] to be very helpful in explaining CSS.
Good luck and let us know what you discover.