@ppl,
Quote:It is a good way to learn/learn about music.
which one is correct.
and how to use learn and learn about
I can think of one way they are different. One can learn to play an instrument or learn a language and in this case, the person can actually do both. In many countries where English is taught as a second language, students learn about the language but are unable to use it in any meaningful fashion.
I could learn, and I have, in fact, learned about playing the guitar by asking some questions about various aspects of guitar playing but that didn't advance my ability to play it one iota.