Giving away a free informational product such as an e-book, an email series or a mini-course is a popular tactic many affiliate marketers use. Usually, your readers will have to provide their email addresses to receive the product from you. You can then use this to sell to them via email marketing. Additionally, an informational product can generate interest in the actual product you're trying to sell. If your product is popular enough and brings enough traffic to your site, you could also monetize the traffic in other ways, such as AdSense.
If you are interested in learning the process behind building a WordPress website then you should look at Learn how to Build High Quality Affiliate Websites. This will help you not just learn how to promote but also get you going with setting up the wordpress website and then promote relevant products. Andrew’s course is a Bestselling Course and we have no doubts why. The following pointers should help you make up your mind. Think of this program like going to affiliate marketing school.
Always disclose your affiliate relationship. Most visitors will probably understand that graphic ads will lead to your getting paid, but if you write a review or use an in-text link as a recommendation, you want your readers to know that may lead to compensation as well. This ensures you retain transparency and trust with your readers, but also, it's required by the FTC's endorsement rules.