Failure is inevitable. But yes, we fail our way towards the completion of whatever we are studying or pursuing. Price Pritchett in his book You2 said "Failure belongs here. It's a sign of progress". His book is pertaining to business and growth, but in studying piano, it is exactly the same. Love and celebrate Failure. You are doing soo well and growth is going to be exponential. You may not know how or when. But it is so!