Are there any universities in their fifties that study painting and calligraphy?

Yes One is the calligraphy university for the elderly, which is generally available in cities and States. Second, China Calligraphy and Painting Correspondence University. You can sign up online. Due to the different teachers, the teaching quality of senior calligraphy universities varies from place to place. China Correspondence College of Painting and Calligraphy is relatively comprehensive. Moreover, textbooks and video lessons are taught by top contemporary teachers.