If its a 28Profile cat(or any cat in that range i would imagine) I would just take it slow and dont get discouraged, it is a very sweet boat and you will have tons of fun in it.
When I took a test drive in the 28Profile I couldnt take it about about 75mph without messing up somehow and I wouldnt dare try to turn at that speed. Dealer got in it and took it right up to 101mph. We hit a huge Trawler wave at about 85 or so and I was about to crap my pants but he kinda just skipped over it, got a little air born but landed it perfectly.
But just like jbrauer said, seat time is the key. It took me almost a whole summer to learn to drive my old HydroStream, but once i did it was so much fun.