1. Just like primary school students have to memorize multiplication formulas, there is no doubt that CAD drawing and drawing recognition are the most basic tools for mechanical design.

2, mechanical principle, mechanical design course to learn well, solved the biggest problem, because CAD is always used in work, it won't take long, you will naturally become skilled. Including reading pictures, it also needs a process from shallow to deep.

3. It is suggested to buy a set of mechanical drawing exercises and a CAD course of Tsinghua University Publishing House. The former is to meet the needs of practical work, and the latter is a manual for daily reference. Because CAD has many functions, it is impossible to remember all the commands.

There are textbooks at work, which is not enough. Don't prove that you don't need it now.

Any interest of people can be changed, and there is no "suitability".