Can you just publish your work on Instagram or similar site? I don't think publishing has been a problem since a long time. People are publishing their own books.
>Can you just publish your work on Instagram or similar site
I don't see how you can make money that way.
>People are publishing their own books.
Now this, on the other hand, has a clear solution. You can simply put your epub on Amazon for $10 or so. There's no equivalent that I know of for art. For whatever reason, people are more willing to buy digital text than digital images.