This will boost your self-confidence. Do not read the entire demonstration from the notes. Memorise your guitar's fretboard it as far as is possible and rehearse this, while watching mirror. Request all your family members to be your judge and go ahead and take complaint constructively. Learning your presentation will help you to create an eye contact with the target audience, which will make a person appear confident. Speak to confidenceSpeak with confidence as well as gumption within your presentation.