First, everyone should design a signature and scan it with a scanner.

Method 1):

Insert the picture into CAD as the base map and trace it directly with spline curve.

Method 2):

Basically, like the method 1, drawings are imported into CorelDRAW. I feel that CDR tracing is better than CAD tracing.

Method 3):

Use software to directly convert pictures into dxf format files for CAD (the software can view my personal data, find my * * * network disk and download it).