Blender does not use the "push-pull" method. It is polygon-based, like Maya or 3ds Max. SketchUp users often struggle with Blender’s right-click select and modal editing. However, there are excellent "SketchUp to Blender" workflows and free add-ons (like "Blender for Architecture") that add walls, doors, and windows.
I'm afraid that's not possible. SketchUp Pro is a commercial software that requires a license to use. However, I can offer some alternatives: get sketchup pro for free