Selling digital goods is a very vital and important component to be able to make extra money on the side and it is a very efficient way of selling online items instead of physical components.
I also learned about making online websites which is very cool, you are able to sell services remotely without having to be in physical interaction with anyone who is pursuing what you need.
They are many ways to be able to make money and selling art is one of them which is creative and unique. It also shows the diversity of ways you make something out of nothing