I believe that understanding classical music should start with understanding the history of classical music. Each period of history will produce different representative figures and genres. By understanding history, it is easier to understand classical music.

You can go to Sound Library, a sound public account that specializes in popularizing scientific music knowledge. There is a column about classical music called Music Talk. This column is told in chronological order and in easy-to-understand language. The development process of Western classical music also involves some knowledge of music theory, as well as music playlists of representative works of classical music of a certain era. You can learn about classical music while listening to it.