Start with the topics you are sure of, check for leaks and fill gaps, and see where your knowledge shortcomings are. Literally speaking, virtue refers to morality, virtue refers to skill, and art refers to cultivation and shaping. In other words, morality and skills should be cultivated together. We should cultivate our own morality from the inside, cultivate our own good moral character from the inside, practice art from the outside and study our own skills and abilities from the outside, and have both. Similar to having both ability and political integrity.