Under the present situation and time limits, it seems very much important to know what comes under the purview of Mechanical Design. There are plenty of resources for Industrial Design. So conceptualization , CAD , Renderings can be covered under Industrial Design . And there is Manufacturing knowledge which is an intersection between Mech and Industrial. So read Industrial material first and then Mech. Sketching need to be mastered!!! to present concepts. And 3D Modelling should be at lightning speeds. Creative Problem Solving comes in when solving real problem.