I think it's better to find a large electric car store first. Generally, this kind of shop is short of manpower, with large sales volume and large maintenance volume. All kinds of faults are also comprehensive (there are some differences between brands). Let's start with the apprentice. Although it takes more time, it is much better than any training. You can also learn how to deal with different customers. It's best to go to the bookstore to buy some books on this subject, and then practice the theory. Everything is most afraid of concentration, and efforts will always succeed.

I wish you success!