In order to understand music, you should have knowledge of music. However, no matter how much knowledge you accumulate, you must have the experience of listening directly with your ears.
Even if you don’t have any knowledge or know the composer or title of the work, if you can feel the impression by listening to the song itself, you can say that the person is a good comprehension.
In order to understand music, you must first humble your heart and listen enthusiastically with your own ears, and experience listening to the flow of sound without snooping into the expression of sound. It is also necessary to repeat and encounter such music as many times as possible.