Is it realistic to think I can make money selling stuff like this?

I’ve never really sold anything online especially anything handmade. A couple days ago I was playing around with some bleach and did this to my pillow case. It got me thinkin that this came out pretty nice and it was only my first attempt at something like this, I could probably get a lot better at it. Do you think I could make money selling shirts and stuff like this?

Does anyone have any experience selling on etsy? What is it like?