I belong to the Art Society of Monmouth County. I joined in order to have some place to display my paintings other than on my own walls. It's a great group. Yesterday, I gave a presentation about using Instagram to promote art. Our meeting place does not have a projector, but I used the television connected to my iPad.
Many artists are very successful in using Instagram to promote their work. Of course, authors use Instagram, too, and just about everybody else. 😁 Marketing is very important and can be exhausting, but social media is a useful tool in this endeavor. While it's fun to have a show in a gallery and enjoy the reception, an artist can only reach a small group of people. Instagram has 700,000,000 users every month. It's worth signing up and following some like-minded folks.
Check out what ArtBusiness.com has to say about using Instagram as a promotional tool and remember that their advice can also be used for writers. https://www.artbusiness.com/artists-how-to-use-post-sell-art-on-instagram.html