As long as you study hard and remember well, you will usually get started quickly. If you work in a tea shop, you will be more free. Is the tea shop easy to use? Working in a tea shop is relatively simple.
Working in a tea shop started as a handyman, which wasted a period of time. I could only learn the formula, and going to a training class was equivalent to spending money to learn the formula. But the tea shop can contact customers and see all kinds of emergencies, which is more practical. Training can only teach tea and comparative theory.