Affiliate Marketing Secrets

I have researched affiliate marketing till I am blue in the face. Literally I am so sleep deprived from trying to make money online it is pathetic. I keep reading the same thing over and over. Everything says to create a squeeze page or blog, write about the product, and post the links from click bank. Well I made a wordpress blog and I did all this work just to find out that they don’t even allow the affiliate ads on there. Not from click bank anyways. Just from amazon. And I already know how to choose a good niche from google keywords and choose all the keywords with low competition and high searches. What am I doing wrong?? Can someone just tell how to do this the easiest and FREE way?? Or just tell me it is all a scam because I am giving up tonight if I don’t find an answer.