Also, I checked opening explorer, and 5. e3 is basically the only move. So I learned something as the result of this discussion. Normally when I get my ass handed to me in the opening I look up the line in the database right after the game to see what's normal. I didn't in this case for whatever reason.
Anyway, it also points out a problem I have in my thinking, especially in blitz games. I get caught in an opening variation that I'm not familiar with, and I have this bad habit of still trying to apply "normal" moves from a similar variation. This is a great example of that happening I think.
I would have thought that opening choices were not the most important thing if you are selecting a coach for the long term.
My reasoning is that you can prepare with a database and computer program. It is other parts of the game you need the coach for. I would think you would look for someone with the knowledge and ability to impart it and a good plan for improving your game.