The instructor. The Castiron said and still says: when you get your driving licence, you are allowed to drive, but you don’t really know how to drive; it is far away from mastering the vehicle.
To get the different racing licences, he had to participate in several driver trainings. And he knew: one day, he will also become an instructor. And he got the possibility to do this for more than a decade.
This must be said: visit driver trainings, for your safety and additionally, you will have a lot of fun and personal satisfaction. The value is always much bigger than the amount of money you have to spend.
The Castiron. The instructor.
Generally more in blogposts 1 to 9.