The SitePoint reference is the best single resource of its kind out there, but learning design and code from it is like trying to learn English from a dictionary. You should have the reference at the ready, but other sources (the Build Your Own Web Site and Head First HTML books, CSS Basics and HTMLDog's tutorials, etc) will guide you through the first tricky steps of putting together a Web site.
Anyone remember [Lissa Explains It All? The site's design is awfully "girly," loaded with ads, and quite dated, but there's a lot of useful information presented well on that site. The lady started the site when she was [URL="http://www.lissaexplains.com/lissa.shtml"]11 years old](http://www.lissaexplains.com/), and for the last 10 years, a lot of people (including myself) have found much-needed assistance from her site.