Here is a useful attempt to list all the main steps and options for creating a 3D model of an actual building for Google Earth: Geo-modelling and SketchUp by Debarti Nath.
It is slightly ‘breathless’ and repetitive. It fails to explain technical terms and appears to be out of date, e.g. in promoting Google Building Maker. However it aims to guide to any beginner in SketchUp for Google Earth, via a clear list of steps and criteria for acceptance of the resulting model.