3D Modeling: Creating a House

What I learned about 3D Modeling:
     I learned on how to take basic shapes and creating a 3d shape. Using a tool from Sketchup, the Push/Pull tool making a 3d shape by pulling the shape upwards. Creating other shapes and putting them together to create a random object. In my case I end up making a house of my choice. Next is making windows and doors, also made a door knob. Then being able to import other complicated objects like a car or a plane. Thats basically what I learned about 3d modeling.