Instead of Etsy I would recommend platforms like Fine Art America or Society 6. Etsy is okay but it’s a lot of work to promote items and you have to pay fees back to Etsy. The other platforms pay you a commission once a photo sells. I won’t say that there is no work involved with marketing, but those platforms do their own marketing and as long as your tags are good, your photos will be found. Like any other platforms you need to like and connect with other artists work to get your photos seen. It all takes effort, no matter where you go. If you have any other specific questions, please don’t hesitate. I’ve used many platforms for many different types of things!