If you played poorly enough to donk off 92% of a $500 roll over a short time then I wouldn't even start at 10NL. I'd play 5NL until I beat it over at least 25k hands.
THEN move up to 10NL and beat that for at least 3/100 over at least 25k hands.
THEN maybe try moving up.
I've been there, done that and its paying off for me now that I've done things the right way.