There are a few steps you need to do if you want a website, you can find them here. After reserving the domain name you may want to design your own website instead hiring someone to do this job for you – the result depends of your webdesign skills. If you don’t want anything important, ust a presentation web site with a few static pages it’s ok to use HTML tags with CSS, but if you want something more complex, such a dynamic website that’s not enough.
The first thing you have to do in designing your website is to choose one programming language (as php, C#, JSP, Java) and a database (MySql, Oracle or others). if you really want to do it youself or to hire an expert web designer to do this job for you, you can use and customize a free Content Managment System (CMS). In the first situation you can get a free CMS to use for (as Joomla – there are some reasone why you should use it, Drupal or WordPress), you configure it and you let people know your website.