Selling on Etsy isn't such an easy thing indeed. I tried several times - created accounts (for comics and short stories illustrations separately). Literally, you have to get your account noticeable. On social media, everywhere.
My first time was abysmal. I created an account, uploaded some of my comics and waited. Nothing happened, even in two months. Then, I started writing about my comics on Reddit, Quora and other social networks (including my Facebook, Twitter, etc.) as well as on my professional thriller comics profile on the official page. That gave a start. I managed to sell only one though.