The prerequisite that everyone should have in calligraphy is: 1. Be able to write all kinds of calligraphy skillfully and form your own style. Second, for knots, pens and composition, the space is just right. Third, we can accurately grasp the content of the text and express it with books that conform to the content of the text. Fourth, there is profound external work. You can learn a lot about the history, sources and schools of China calligraphy. Have a certain understanding of poetry and prose.
Run, brother. I wish you success.