A skill that is about much more than passing a test
A WISE parent or friend will seek the help of reliable professionals in preparing a person for the complex world of the car and traffic. It's not enough for today's family/ friends to learn as their parents did. The driving world they enter is far too intense to tackle without serious preparation.
Learning to drive a car safely and efficiently in modern traffic involves much more than training to pass a government road test and get a license. However, this is a necessary first stage.
Government driver examiners want to ensure that the new driver has adequate control over the vehicle, knows the rules of the road and the correct procedures for managing a vehicle in traffic, and can make safe decisions.
The professional instructor is skilled in teaching these basics. Your role as parent/co-driver is to reinforce what the instructor teaches and provide practice time.
Attitude determines how knowledge and skills will be used. It determines whether a driver will be cooperative or competitive in traffic. So your biggest contribution to your family/friends safety and effectiveness behind the wheel will be your example.
Patience, courtesy, and a willingness to improve will be your best assets.
Now is the time to review your own driving habits and offer your family/friend the example of courtesy and consideration for other road users. This may do more than anything else to ensure your family/friend driving safety.