As a buyer, here is what my impressions are.
On the good side, you look very genuine because you allow pick up as an option.
Your prices are very reasonable and the size of the paintings is good, as I can see it would fit in a lot of homes.
If I were you though, I'd get my photos round the right way. Not sure if it is affecting everyone but I am on a computer and many of the photos are showing as sideways to me.
Buyers will want to have a close look before they buy, so having plenty of photos and having them the right way round will help.
Also, I don't know if this is necessary or would help but I think the title is important. You already have the words, Aboriginal art paintings, original and that is good (though I would change it to painting as you are only seling one painting at a time in the ads).
I think that word original is important. But I have noticed with some other Aboriginal art that the paintings have names and I don't know why, but that always appeals to me and maybe it will to other buyers too. So eg you could have a title such as 'Turtle Journey" Original Yorta Yorta Aboriginal painting. If there is room, add the words by Dillon Devine.
At the moment, with zero feedback, you look very new to people looking. It does not mean you are not a good artist, just that you are new and people don't know yet how reliable you are.
Maybe if you had some smaller art pieces as well that you could list at a slightly smaller price, you may get some sales that push up that feedback score.
When you do sell, be sure to wrap the parcel carefully and post off quickly so you have some happy customers who might leave good feedback.
I think once you have some sales, that might help to make more sales, if that makes sense. But do consider giving titles to your paintings.
