How to sketch well? (Urgent)

You first use your hand to lock a box, and then observe the position of this thing in each box, and then measure the proportion of the paper roughly hit a few lines, after that is to observe the shape, light and dark, and copying is almost the same, a little more difficult than copying only. Remember to be calm, the most important thing in painting is to be calm, I am also studying art, I hope I can help you. I hope I can help you!

The most important thing to pay attention to is the proportion and the general position of the whole picture, as well as the light and darkness