1: It depends on where you go to study. You have professional knowledge of automobile school and learning theory.
2. Have a repair shop to learn the actual operation.
3: See if you want to learn to repair cars or trucks. Most cars are petrol cars. Trucks are basically diesel cars now.
4. School study: internship after graduation. Time is when you graduate. Studying in the garage, some for one year, some for three years, depends on your own efforts. But repair is a technical job, and we should learn from the old ones. Just like the car I am driving now, I invited more than 10 mechanics to see a problem, but none of them solved it, including myself.
5. Learning and repairing should also be classified into different categories: machine repair major, chassis repair or specialized engine.