https://www.domestika.org/en/courses/1991-technical-drawing-techniques-for-3d-representation

Develop three-dimensional ideas applying principles of geometry and volumetric drawing  Geometry is the cornerstone of technical drawing, and mastering its principles is the key to accurately representing the world that surrounds you. Join industrial designer Rodrigo Chávez and learn basic drawing techniques to create a 3D representation of a lamp.  By the end of the course, you'll know how to easily make precise 3D designs of any object using volumetric drawing and applying key concepts you've learned including perspective, lines, depth, and hierarchy.