You can put up banners on your site, to promote your affiliate offers. Most affiliate programs will usually provide their own creatives when you sign up for their offers. All you have to do is insert the banner on a highly trafficked page (your affiliate tracking is usually embedded within the code). Banner ads in the right locations can do a great job of driving sales.
Once your hosting is set up, you need to install a content management system (CMS) for your site. We recommend WordPress because it is easy to use and a beginner (like you!) can quite quickly figure out how it works. Most good hosting providers will have a one-click install option for WordPress, which means it will only take you a couple of minutes and you will have WordPress installed on your site.
The problem with affiliate marketing, like many other home business options, are the so-called gurus and get-rich-quick programs that suggest affiliate marketing can be done fast and with little effort. Odds are you've read claims of affiliate marketing programs that say you can make hundreds of thousands of dollars a month doing almost nothing ("Three clicks to rich!"). Or, they suggest you can set up your affiliate site, and then forget it, except to check your bank deposits.