Training is useless. You can't learn anything in those places where computers are trained. It's best to find your own machinery factory or what industry you want to do, starting with an apprentice. The drawings used in the factory are quite different from what the teacher said. I do drawing and design in a hardware factory in Guangdong. If you want to learn, go to the factory and start learning as an apprentice. So your technical and practical needs. Drawings and everything can be studied together, apprenticed in the factory for 3 months and studied in the training place for one year.