Clickbank University (CBU) has some pretty good affiliate training, but not my #1 choice. I've been doing this stuff for almost a decade now. If you want to be an affiliate and build affiliate websites, then you are better off learning about that stuff from this affiliate training center. They've been around for 15 years, and have produced thousands of success stories (some of which I've personally mentored, since 2012).
Start by taking other courses you’re interested in: Not only is this important competitor and opportunity analysis, but it also gives you an idea of how a course could or should look and feel. What’s the pacing like? Is it via email, video, in-person chats? Once you understand how you want your course to look, it’s time to decide what it should include. Those same courses are a great starting place. How can you make your course better or more interesting? Do you have experience others don’t?

The more traffic you have, the more money you can make with ClickBank. In order to maximize your traffic, you should spend some time identifying commonly searched keywords that relate to the product you plan to sell. If you create articles and other content based on those keywords you can often get some traffic from search engines, especially if you target the less competitive long-tail keywords in your niche. 
Tutor students. Many families prefer the flexibility of using an online tutor. Depending on your background, you could be simply helping a child with homework or providing college-level support. You need to have your own computer and high speed internet. Experience required differs among companies. Some require “strong experience,” while others require a specific educational background. However, most companies do require a college degree.