Another thing to consider is how much time you have actually put into learning skills for the arts or sciences. No one will have good skills at something if they haven't tried to actually take the time to learn it. Also ask yourself do you enjoy doing the art or learning about the art? Maybe become a researcher or teacher of the history of art, or for sciences just find exactly what kind of science is best for you as there are many types of sciences and not all of them are so high level. And as for writing do you mean all writing in general or just creative writing? If it isn't all writing then maybe just become a writer for things you are interested in.
If you are in the U.S.: https://www.bls.gov/ooh/