1. Don't read books at first, first find a drawing, draw a gourd ladle by yourself, and draw with CAD for a few days (it is better to use English version, which will help you learn quickly and use the software in the future), and then read books. When reading books, don't look at chapter by chapter, and you won't calculate the area.
2. Then you can try to draw walls and doors, and be familiar with the commands of array, filling and marking.
3. When you think your picture is drawn, but it is ugly, but you always feel that it takes a long time and it is troublesome to modify it. You can look at accurate drawings, layers, blocks, these slightly more complicated things. And familiar with elevation, section, structure and so on;
4. When these things are almost done, but they are still ugly and inefficient, you can find a second-developed disk to save trouble, such as Tianzheng, Xinzhou, CAXA, etc., preferably in Chinese, which saves trouble and has more fonts;
5. When you get familiar with one of the secondary development software. Well, congratulations, by this time, basically dealing with two-dimensional drawings is no problem, but what you have learned is only the basics. As for three-dimensional drawing, hehe, find several CAD forums to learn;
6. Let's talk about drawing and standards. In fact, personally, the most important thing in CAD is drawing, not drawing. If you can't understand a drawing or a model, it's not easy to do at all, and it's full of flaws. By the same token, if you design drawings without following various standards, I'm afraid the boss will scold you for being a dog to learn from the nozzle first. But you can't master the drawings and standards in a few months. It's a matter of endless flow, and you can only make up for the shortcomings through more practice. "