Music Lessons with Doc Marshall All you need to know to perform your favorite songs Guitar Lessons Learn how to play popular songs on the guitar. Doc Marshall will show you how to easily play many of the songs that people enjoy. We will show students how to strum the guitar and to play all the guitar chords necessary, but not so many that it will be confusing. Don’t worry about being “perfect” because that ruins music for everyone. Use these lessons to get more fun out of your guitar playing. Click here for the list of guitar lessons.