Curious about flying in IFR

I've only flown through a few light clouds,
and a couple of twilight evenings with pretty
good evening light. (had the red cockpit light on)
So that wasn't IFR.

Then flew out of Atlanta for an hour wearing the
hood for training. A little nauseating, but other
than that just kept my eye on the six-pack.

I keep trying to imagine flying in a white-out
for an extended period of time. Wouldn't you be
focused on your instruments enough to discern
orientation? (not counting synthetic vision).

Can't quite picture getting upside down without
gravity and attitude indicator letting me know
how OFF you are.

___