I go with cookie... http://www.w3schools.com/ is a Great place to start with especially for beginners.
First you've to learn what HTML is then get to know CSS and try to apply the CSS to the HTML...
I suppose you have good knowledge of S/W like Photoshop
Reading tutorials is a great way, or maybe reading books...
At www.knowfree.net you can download free e-books. I downloaded a CSS one and it's really good, you should check it out.. I can't remember the name now...