Let me give you some examples.
1 Hand-drawn sketch can take the place of art college entrance examination class.
The stick figure is very powerful, so you can teach the children instead.
Chinese painting and oil painting are very powerful. There is a special commercial studio to draw a picture for people, which costs a few dollars and dozens of dollars. They will buy and sell them.
4 graffiti and other hand-painted ability is super strong, you can be a hand-painted wall decoration company.
5 animation is very powerful, you can do part-time jobs for animation companies, but generally you also draw lines for master drafts, which requires rich professional knowledge.
That's about it. You can all find part-time jobs. How developed the Internet is depends on your level.