First, learn "Mechanical Drawing" and "Mechanical Basis", which are the most basic basic knowledge and must be mastered;

Second, "materials and metal technology"-all parts are made of materials; Mechanical foundation-the design of mechanical products should conform to the basic principles of mechanics; Fundamentals of mechanical design-composition and design of mechanism;

Third, machinery and electricity cannot be separated. If you want to learn machinery, you must learn electricity-the basics of electrician and electronics.

Fourth, focus on a certain industry. Because the machinery industry is too wide, it is suggested that after the foundation is established, the key selection, such as hydraulic pneumatic control, sheet metal, mold, equipment, etc. Everything is enough to study and pursue for a lifetime.

Finally, good luck; I always believe that people who study machinery are the smartest and most pragmatic people.