I see boards labeled as advanced and find myself scratching my head. Typically, a rockered board that is mid-flexing or softer is typically called beginner. Reason being, they are more catch free than a traditional cambered board.
That said, starting with a stiff board like a DH2, which is traditional camber with early rise might not be the best board for you. I wouldn't call it a park board. It definitely could do big mountain terrain no problem. It's a true twin, stiff board, with lots of pop.
All that said, why not make snowboarding a little more enjoyable to the first year or so, and get a board like a K2 Raygun, which is pretty catch free so that you aren't destroying your body as you learn to carve, but still has some pop and a twin shape, so that if you want to become proficient at riding switch, you can do it.
Other boards that are forgiving, but in no way would I ever say are limiting with growth, are:
Never Summer SL
K2 Turbo Dream
GNU Carbon Credit
Rome Reverb Rocker
All pretty good boards. All pretty catch free. My choice would be the Coda. Board is one that any rider level would love and use as their everyday board, but forgiving enough and catch free, that you aren't going to get destroyed for every poor carve.
That DH2 though? You won't even see the benefit of having that board (huge booters) for a couple years, and in the meantime, it's not playful, or even that fun to ride groomers with. Coda is much more playful and fun.