Here's how to curtsy:
From a standing position with your arms at your sides, gently hold your skirt on both sides with your thumbs and first two fingers, pinkies extended, and at the same time, bend and cross your left leg behind your right one, toe touching the floor while bending your right leg slightly to accommodate this bend and bend slightly at the hip, keeping the back straight and holding the head in a nod. The whole act takes about 2 seconds and is done in one graceful manner.