If you don't have the equipment, you'd better go to a place where professional sound engineers train. There are many in Shanghai.
If you want to be a sound engineer, you should learn the basics of acoustics. In addition, for the use of equipment, it is best to have equipment practice and accumulate experience.
For books, I suggest you buy a tuner (elementary)
If you have equipment, you can practice.
You can buy "The Basis of Vocal Music for Phonologists" published by National Defense Industry Press.
Audio equipment principle and skills training China Labor and Social Security Press.
Tuning technology is published by xidian university Publishing House.
Of course, the most important thing is practice. With the accumulation of equipment use, it will be helpful to read these books, otherwise only theoretical knowledge, seeing real equipment will be in a hurry.