If you don't have any products to sell, don't you worry you can still earn on Amazon through Amazon Affiliate by selling products of other sellers. It is really simple, just register on Amazon Affiliate. Then once registered, choose any products that you want to advertise to your customers. You can sell on your blog, facebook, or other social media sites all you need is the link for that product that you can generate through Amazon Affiliate website.
You will earn advertising fees from Qualifying Purchases that your readers or customers makes. The great thing about Amazon Affiliate is that there are no need for third-party advertiser approvals.
Here is the link if you want to sign up and earn money: https://affiliate-program.amazon.com