Sorry about the delay.
Sorry, I didn't mean to suggest for a microsecond that post-processing isn't involved. Of course it is. I meant, the dual-exposure (twice raw processing) isn't necessary. Just one good raw edit, then your Levels work.
It's been a LONG time since you took the Raw Class, and a heck of a lot has changed in that time. As a previous member you don't need to pay full price again, only the refresher price. I urge you to consider it.
This is with a single raw edit, then Levels:
Yes, of course you should have used one of those. Some lighting would have helped your cause a LOT.