Harvard University offers some short but paid online courses in Arts and Designs. While some of them cost around $2900, others cost around $1,880. Usually, you need to register atmost in January. Some of them include Introduction to Acting, American Dreams Made in Hollywood, Developing Museum Theater, Understanding Architecture, Matisse: Painting that Transcends Reality, The Role of the Arts and Humanities in Documenting and Dealing with Climate Change, The Imagination of Disaster: American Science Fiction Cinema and Television and Technomusicology. Usually, you need to register atmost in January.