If you are wondering to become a mechanical design engg. or a 3d cad modeler . First you will have to learn about the 2d drawings, entities and use of planes.
In this course first i will interduce you whole entities and planes used in solidworks 2d and then i will teach you to how we can use these entities .
If you become expert in solidworks 2d then you can design any model with the help of different 2d entities and planes in solidworks.