You don't have to be a professional photographer to sell your photos for money. People are constantly in need of high-quality, unique stock photography for websites, presentations, brochures, and so on, and are willing to pay for the right image. People generally search for images on stock photography sites, like ShutterStock, Dreamstime, and iStockphoto by keywords, not by photographer name, so you have the same chance as anyone else of having your image selected. Just be careful that you don't have images of trademarked brands, copyrighted art, or people's faces that are readily identifiable unless you have a model release - virtually anything else is fair game.
If my piece of content is so unique and valuable around hiking backpack recommendations, that other reputable outdoor websites are willing to link to it and build the page’s authority, then I’d have a very real opportunity to rank high in organic search for these search terms (meaning, my page will come up first when someone searches for hiking backpacks).