Many artists struggle with the business aspect of being an artist. It doesn't feel right to be a self promoter, somehow that doesn't mesh with being a sensitive, creative artist.
Here are some resources and courses for artists to take online, for a small fee, to learn about the business of art. You can take all of them or one or two that interest you.
These courses were developed by artists and cultural workers with tips on how to manage your career. The Cultural Human Resources Council of Canada has put these together on their website. Check it out.