As for how long it will take to learn to cook, I'll tell you what I know.
The first step for a chef is to learn to cut things. This is a technical job, and the size and thickness should be unified. If you want to send and receive freely, it is impossible without three months.
The second is side dishes, which are relatively simple, mainly based on recipes and colors. It will take about half a month to do this well.
The third is the wok, which is the key point. It will take at least five months to learn the technology and control the temperature, so as to make small achievements. Except, of course, that you are talented.
Well, that's all I know. I hope I can help you.