This tune is a great study in the Melodic style for D major. There's a lot of licks in the switcher. Some give you classical style embellishments. Other klicks show you alternative fingerings in the melodic or single string style. Pay attention to the pick hand suggestions. Most of the time, when playing Single String, TITI is used. However, in some situations, using the same finger repeatedly can get you very consistent tone and volume. It's good to try and use both.