Is certificate is required to prove that i am a guitarist? because i am not going for any class but learning from a guitarist who plays in orchestras. he is teaching me in his house. as the fees is low I am going to his house to learn. but my friend says"just leave that class and join any institute so that you will get certificate" but my aim is to learn to play guitar(it's already 1 and half years, i am going to his house to learn) and after he says "YOU HAVE LEARNT EVERYTHING" i want to join an orchestra like him. is this possible without a certificate? I mean... without his recommendation.