I'm an art major, and I sketch very well. If you want to improve your sketching level, you must draw every day. To put it simply, it is better for beginners to draw pictures, mainly to practice the fluency of lines, and then you should pay attention to the dynamics of the next level. Finally, you can draw a light and dark sketch. Some books are better, which I use now. Almost everyone in our class uses this sketch book. : perfect teaching-sketch (the book is very expensive, priced at 80, if discounted, it should be around 70. This book is very good! ! I bought several books, including "Color and Sketch" and Zheng Bo's sketches. At first, I used this book very well. I drew this book when I first started painting. It costs about 25 RMB, and Ping Yu's sketch is also suitable for her. We basically use all three books, and they are all very good. I wonder if they are of any use to you. Go to the art bookstore and see for yourself. The boss should introduce them to you. Just try it.