Does the photographer have to pass the training class?

No training class. Photography has no difficult skills. Mainly practice more. I taught myself. Learning to use a camera is the first step. Just read the instructions. Then, you can look at the photography textbook of the New York Institute of Photography. That's what I learned. You'd better buy a camera to help you understand before you learn, so you can learn faster. There is also the improvement of aesthetic ability, which depends on your own continuous accumulation and reading more books on art and literature. The more you know about astronomical geography, the wider your perspective and the deeper your understanding of things. This is the essence of photography. Everyone can take pictures, but not everyone can. I still wish you to become a master and move towards this goal!