Good advice Arlene. I LOVE your work Myrna. I would adjust your titles to read something like: Abstract Blue Heron Mixed Media Artwork in hues of Chartreuse Green, Cyan Blue, and etc. If you want to include the string of key words after that it's completely up to you. But I would think that art is also all about the colors when it comes to decorating. Someone is either going to be looking for a Blue Heron specifically, or they will be looking to match a color scheme, so I would include the main colors in your titles. Or they will be just searching art and just happen upon it and love it (like me), but that's so much to search through. You could always ask your customers how they found you and capitalize on that as well.
The quality in the photos of your work is fantastic. I would include more in each listing. Maybe even a last one that shows multiple items packaged for shipment, so that they know what it will look like when it leaves your studio. And like Arlene said, I would start just like you did with the Heron, with as much of the full piece as you can get into your first photo, and the second photo should be a framed version hanging on a wall. The Blue Heron looks beautiful on that wood wall, but it needs to be cropped closer in.
Your reviews are fantastic!!!
I would increase your branding by adding a shop header that includes a section of your best work. One that matches your avatar, and packaging, stickers, business cards, etc.
Wishing you the best here.
~Keri