The classics begin with the Gregorian chant (the first sources date back to the 10th century) and continue today, say, with minimalism. For a thousand years, an unimaginable number of schools, trends, genres, styles, sub-styles and forms were born and went down in history. Today all this is actively researched and interpreted by hundreds of conductors, musicians and singers. But in the minds of the majority of potential listeners, classical music is represented by a couple of works by Bach, Vivaldi, Mozart, Beethoven and Tchaikovsky, which are either boring at school, or very badly performed, or upon closer examination, turn out to be indigestible for an unprepared listener. Are you also stuck on this Education-approved gentleman's set? So put it aside and try to listen to something else - small forms (or separate parts of large ones), from this or that era, this or that author, in this or that performance, etc. Chances are high that over time you will find "your" classics.
Margarita, this is not worth fixing. It's not a problem! More often than not, you memorize the tune of simple "hit" or radio songs - but often it is primitive consonant music, built around 2-3 chords with a primitive rhythm. In a very simple language - academic music carries the art of "technique, skill, mastery, complexity" (in a word - a grandmaster), and we, mere mortals, simply do not understand what is playing there, and in general ... where did it start ?? And where to clap?))) And so on .. if you want to learn - run to a music school and take the path of a musician