CAD is an irreplaceable software for 2D drawing at present. Of course, you have to take the intermediate exam for textual research, but now the employer pays attention to your proficiency.

You can learn by yourself slowly, and you will get something.

Certificates issued by many institutions that hold examinations should be recognized by the state and can be found online.

The content of the exam is mainly multiple-choice questions plus some operational questions.

Some places with high frequency have an exam once a month.

The examination fee is less than 100 yuan.

Dear. E is an accurate three-dimensional drawing software, such as the drawing of automobile shells and various complex structures.

UG is also dealing with more accurate three-dimensional drawing software, and its application in automatic machine tools is more accurate and applicable.

But CAD has irreplaceable advantages in two-dimensional drawing, so I suggest that you must learn CAD well.