You will have to work at getting one or more of your blogs to get ranked on the first page of Google. This may take a while, but you need to check it daily.
What I do is choose a product that matches the blog I wrote. Then I would do a search in Amazon to find the item. Copy the url and place the url in some anchor text in the blog. Here is some training to help you with adding a link. How to Add Links in WordPress? Dave