Depends on what kind of website you are looking to create. If you want a blog, you could try checking out WordPress and choosing a theme that looks nice. If you really want to get into making the site yourself you will need to learn HTML & CSS predominantly. Then maybe learn a little javascript (check out the JQuery library) and PHP (integrating a content management system into your site) to spice things up. This site is a great place to learn, great tutorials.