What gives me hope (to find my first ruga too) is that 792 meters is quite achievable and that you don't need the 320. Was your finder tiered and slots filled with enhancers?
BIg gratz.
The sad part is that if all ores can be found with low finders, and they are not rare anymore... they will lose the value eventually, as it happened to most of them... Sell it fast!!!
T2.8 finder but no enhancers fitted and to be honest my mining skills are not especially high either although I was just using TK120 cos it was a good deal in the auction.