Hi Ana,
Affiliate marketing can be rough at first unless you know what you are doing. Make sure you do lots of research first. I know it's a pain to do but it will save you lots of headaches. Here is an important suggestion for research "affiliate link cloaking." Make sure you know how to do this to prevent affiliate ID theft. Just type in (affiliate link cloaker) in major search engines and you will find some free tools and info on how to do this. If you have a program that can create php files like Dreamweaver, you can cloak you link that way too...just let me know if you want to learn how to do this.

Building "niche blogs" is probably the best way to sell affiliate products, plus it's cheap and search engines love blogs. You can check my "free Wordpress video tutorials" on how to build blogs if interested. Good Luck !