You could be a private music teacher, an art therapist, have an art studio and offer classes, teach people to read through a literacy program, train people at a company or business on things or products they need to learn for their jobs, or a private tutor.
Nancy recommends the following next steps:
You've got some options in teaching art or music outside of a school environment. I will address the opportunities for teaching art, because that is what I am most familiar with. Here are some ideas that are not part of a regular school system.
You could look for community art galleries or art centers n your area, many of them offer art classes, as do private art studios. Many public schools offer after-school programs, and they often offer art classes taught by outside art teachers. Many communities have rec-centers, of YMCA's or Boys and Girls Clubs with after school, weekend, and summer programs for kids, that often include art classes. If you think you would like to work with elderly people, many assisted living facilities offer art classes to their residents as part of an enrichment program. Finally, many art museums also offer art classes and educational art experiences for museum visitors.
You would have to do some legwork to identify the specific opportunities where you live, but this should give you an idea of places to start looking. Depending on the place, for some of these teaching jobs, you'll need a high school diploma, but most would require a degree in studio art, and some experience in working with kids and adults, such as as a camp counselor, babysitter, retail, or other job experience.
The only downside is that few of the above options are full-time, and they usually don't have many benefits. For full time work with benefits, you would want to work as a teacher in a public or private school. In most school systems, an art teacher in a public school system teaching elementary, middle, or high school, does not teach anything but art. You will need to get a degree in art education and pass your state's certification exams, which will give you a teaching license in Art K-12. If you have a masters degree in art, (an MFA), you could also teach art at the college level. If you wanted to go into art education in a museum setting, then you would need a degree in art education.
I hope this helps! Best wishes!