1, this suggestion you can go to a professional school for training, which should be better than other majors. 2. Generally, the cost of learning this technology is around 1000-7000. It depends on your province, and the prices are different in different provinces. I suggest you experience it yourself, it will be better. 5. Go and have a look. If it is good, I am making my own decision. 6, generally study this 1-2 months, depending on your entry ability. Then decide for yourself.