Try posting on the "meet on board" here at Cruisemates to find those other cruisers:
Its still early for your cruise, so don't be disappointed it others haven't posted there yet, just check it from time to time.
You should also read through this section for "first time cruisers", lots of neat information, enjoy:
I will not be on the October Cruise, I'm infact traveling on another Carnival ship in a month . But I do want to tell you that My first cruise ever was on the Triumph last year and it was the most amazing experience ever. I still think about it and can't help but smile.