Hello, 🙂 Although I have just started learning the harp, I have been playing the piano for 20 years and can more or less answer your question. I’ve started playing the piano with teachers that didn’t really believe in music theory, and I can tell you I wish it was the opposite! Music theory is important, in more than a way. Not only can you learn pieces and read sheet music faster, as you’ll recognize common note /rythym patterns, but it will also improve your overall playing as well as comprehension of the composition.