Listen to music. Listen for when the lead line seems to come “home.” That’s it. Don’t analyse, just observe. When you hear things you recognize, take note. Again, don’t analyse, just take note. Just observe, like a little child sitting on the floor listening to rest of the family talk. Take it in, and observe. You can’t analyze, you don’t have the frame of reference. Learn to hear natively. At any age.
Analysis will come later.