Affiliate marketing seems mysterious to me

Affiliate marketing seems mysterious to me. I've been an affiliate marketer with Amazon for over a year, and I've only made about $75 from it. Meanwhile, I hear about affiliate marketers making $75 a day from it. Yes! I admit that I suck at affiliate marketing. I also admit that I don't know how to do affiliate marketing. That's why it's so mysterious to me. Therefore, I should either learn how to do affiliate marketing properly or try some other (preferably easier) way to make money online. But in my recent experience, making money online is nearly possible whether its easy or not.