I want to be a chef in a small, wealthy European country like Denmark. Please tell me how to go through the formalities.

As long as you have a chef's qualification certificate, and then invite someone (your boss abroad) to hire you abroad, give you a guarantee, talk about the good treatment, such as the salary after tax should be above the amount of wages stipulated by the state, (for example, the after-tax salary of workers hired in Denmark should be above 1W3, and they are eligible to apply or invite), and provide employees' houses, etc ... After all these are handled, you can apply for a work visa with these materials to the Immigration Bureau, which is usually signed in one to three months.