This one kinda surprised me. I started my affiliate account with Amazon fully expecting to not even qualify. ( You have to get 3 commissions in 3 months to qualify, or at least that's the way it was when I started.) 

I earned $3.82 my first 6 months by posting one of my links in a facebook gardening group. It was for an awesome gardening hoe that had been a game changer for my garden work. That slowly climbed to an average $90 monthly to now buying groceries for our family. It does take time to thoughtfully create content to get my links out there but the payoff is worth it to me. 

As a Photographer you are already naturally recommending gear, props, clothing, and tools all the time. Start simply by sharing links to items you already use or are actively learning with, like camera accessories, memory cards, reflectors, tripods, editing tools, backdrops, client wardrobe pieces, or even everyday items you use. Share them everywhere relevant on your own social accounts and in groups where allowed.

You don’t need a large following or advanced skills. Just make honest recommendations for the products you already love and use.