It's exciting when they first get started, isn't it? I've got pics of our first house being built...and when I look at them now, I have NO idea what that picture is of...lots of beams, wood, wiring, etc.
The house reflected in your rearview mirror IS the house I had built and lived in for many years before I moved here (except I had a bay window to the left of the porch). There are many like it around...but so far, I've never seen one with a floorplan as livable as ours was!! I really liked that house!
Enjoy it...and don't stress too much!