Hey, welcome to The Slacker's Guide to HTML. Check out the left sidebar or one of the guides listed below.
A great place to get started would be at the basics of HTML If you start from there and just keep reading, you should be an HTML pro (really) in about two hours.
After you've spent some time on HTML and perhaps made a page or two you should jump right into CSS (cascading style sheets), which is a simple language used to add style and design elements to the relatively bland HTML tags.