dear; I suggest you take a brick to practice, and then add another brick to yourself when you have finished practicing. In the process of practicing, you use a left-hand tray, put your right hand behind your back, spread out your fingers of your left hand, open it like a fan, stand up straight, hold your chest out, look at the front, and don't look at the tray. Your steps must be natural, and you can't move quickly and slowly. When you bend your waist, your left hand should be balanced and can't shake. And don't look at the tray, just look at what you want. Practice repeatedly like this, and it will be natural.