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.