If you really want to earn with amazon affiliates then you'll need to write reviews about products you're promoting on amazon.
Start a blog and do reviews on the products you've bought and would recommend on amazon and then use your affiliate link to link to the product you would recommend.
Has something you purchased on amazon been a great help to you or would it help someone else?
Then review that and tell your blog readers how that product has helped you and then post your affiliate link to the product on amazon.
Another great thing about amazon affiliates is if that same person who clicked your link orders other things as well and the cookie is still valid then you can earn a commission on those other products that the person buys after clicking your link even though you didn't promote the other products.
If you know what you're doing and can write a good blog and review products then you can really earn lots of money through amazon affiliate products.
But you must work hard to achieve the earnings.