The item is fine; if you do everything else right (photography, SEO, pricing, etc.) you will see whether it is an item that has traction. I don't think it's a bad product off-hand, or too plain.
However, the first photo doesn't really make it clear what it is. In fact, I can't find a single straight-on view of an actual finished product in your shop, in any of the photos. This is a photo you need to take, and probably use as the first photo in most listings.
Then you should read about SEO. Here is a basic introduction by Etsy:
https://blog.etsy.com/en/2012/how-to-get-found-in-search/