I second the demo option if possible. Demo as many boards as you can. At 5 times on the hill you're still learning the very basics so the actual board isn't going to make much of a difference at this point.
For what it's worth, even though a lot of people will suggest some form of rocker, riding camber is like learning to drive stick when you first drive a car. Okay so the first day you stall it a couple times (catch your edges) but then you LEARN THE FUCK HOW TO PUSH IN THE CLUTCH!
My GF has learned over the last few years on a camber board, tested out a couple rocker/hybrid boards last year and liked some features but loved getting back on her camber board at the end of the day.
What do ALL of the racers/boardercross guys use? Just sayin...