Where is the most basic place to learn turning? What knowledge should I master?

Look at the basic knowledge of lathe work here, there are many such books!

Mechanic in One Step-Turner 1VCD

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Basic knowledge of lathe, composition of lathe, basic operation method of lathe, etc. And through the processing examples of typical workpieces such as multi-step long shaft, knurled nut, bushing and screw, we can teach you all kinds of basic operating essentials of lathe in a simple way and take you to get started easily. The film adopts omni-directional shooting mode, which vividly, intuitively and comprehensively shows various basic operation skills of lathe workers and has strong pertinence and practicability. It can be used as a training material for junior lathe workers. ...

Introduction to graphic lathe work

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"Turner" is a beginner Turner, and it is written according to the post requirements of Turner, with special emphasis on the combination with practical operation. The book uses a large number of charts to explain the technical knowledge of lathe operators intuitively and simply, to meet the needs of different basic readers and achieve the purpose of rapid learning. This book can be used for self-study and reference by young skilled workers who are beginners in lathe work or short-term lathe work, and can also be used as a teaching reference book for vocational and technical training schools or training courses. ...

A concise lathe manual (second edition)

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A compilation of knowledge that lathe workers must master. This book has three chapters. The first chapter introduces the model, use and adjustment of lathe, the basic knowledge of lathe cutting, the basic knowledge of lathe measuring tool and lathe fixture. The second chapter introduces turning of excircle, turning of internal and external grooves, machining of cylindrical holes, turning of conical surfaces, turning of special surfaces, turning of eccentric parts, surface modification and thread machining. The third chapter introduces the production process and technological process, the composition of technological process, ...