Agree with the sentiment, the answer is just soapboxing life advise, not really answering. But being able to focus on/appreciate classical music is a skill, hearing the different instruments and such.
Aaron Copland's "What to Listen For in Music" is a great primer!
I think most people fall into a Passive Listening model when getting into symphonic or chamber music. The book suggested above would certainly push an average listener closer to an 'active' model.
