What types of customers have you worked with?
Guitar lessons- learning songs, chords, rhythms, theory, reading, soloing,improvisation, .....
advice and help on purchasing guitars and music equipment.
What advice would you give a customer looking to hire a provider in your area of work?
Have some goals in mind- even if it is just to play certain songs, etc. Have time available to practice. No matter how good the teacher is, lessons are not successful unless the student practices.