Simplify the following text for a Grade 9 native English-speaking person.
Original: Because the former was largely a McCartney composition ( Harrison received a credit simply for playing the guitar solo ) and the latter was an instrumental pastiche of The Shadows , `` Do n't Bother Me '' is considered Harrison 's first song by most ( including the composer himself ) .
Simplified: `` Do n't Bother Me '' is considered Harrison 's first song by most ( including the composer himself ) .