Lessons can be for technique: e.g. the mechanics of hitting the ball; tactics, e.g. shot selection and rules, e.g. what is a “let” and a “stroke”.
They can be for an individual , a couple or pair of players or in groups.
Each will last an hour typically.
I can lend rackets and balls during the sessions so there is no need to purchase new ones if you are new to the sport.