Building a website gets easier all the time. WordPress alone has made it infinitely easier to build websites, with the right theme, you can be up and away in no time. Of course, as an affiliate, there are specific things (such as SEO) that you need to keep in mind when building your affiliate website.
These lessons will take you through everything from getting set up with your websites domain name (eg www.yourdomain.com) and web hosting, through to the overall structure of your website and pages.
One of the easiest and most common ways to get started with this is to use a theme, such as AffiloTheme. There are a lot of themes for you to check out all over the internet, but some are better than others for the specific purpose of affiliate marketing.
It's important to spend the time learning about website building so you can get it right as early as possible, so have a look through these lessons to find out what to do, and even what not to do!