Probably not if it's a robin's song or elk's bugle. Maybe not if it's an orchestra or band piece. But if you can get it settled down to a melody that you can sing, then you can find the notes to play on your instrument. For beginners, sing the song, sing the first note for a long time, play various keys on your instrument while listening to see if they match the note you're singing. Do that with the second note and the third. It will get easier and faster with practice.