Rather than just reading the tutorial sections, it might be
better to try to follow one through.
The education in the getting started shows what you might get from an
architect and go forward with. At the same time,
OpenStudio/Sketchup might be more useful if you GOT a sketchup file from
them.
Also, don't forget the EnergyPlus Example File Generator
application. Very useful for generic buildings to start out
with. And then you might modify in Sketchup.
I know, architects will design much more fanciful facades than the EEFG
will produce (but then again, for an energy analysis you don't need ALL
the bells and whistles (and nooks and crannies) of a building to produce
an accurate energy simulation. Again, the education center tutorial
in the GettingStarted manual talks about those kinds of issues.