this will be my first time

So girls I need help with advice and tips on giving good head .. this boy that I'm talking to is a virgin and I'm not .. I want him to enjoy his first time but I never gave head before ... and I know it's cliche but I plan to do it prom night .. can somebody help me please or I'll take as much advice .. ALSO In class they said the balls is the sensitive part for. Boys.. true or False?