Purdy being a rookie means nothing. We are now in the playoffs so he's closer to a 2nd year player by now. Also, he already had his first playoff game experience and he started off a little slow but overcame it and they won easily. He also gets to lean on the best defense in the league and a coaching staff that knows how to scheme and adjust. If he starts off slow, I'd imagine they will be fine to change things up.
Can our defense rattle the young QB? Because they will be content with short dump offs and routes to let their playmakers make plays in the open field. They don't need the big plays to win.
My biggest concern is our OL vs their front. Our pass protection held up against Tampa and allowed Dak to scan the field. Can they do it against a much better rush? Can we establish the run? If we can't hold up in those areas, I see this game being a loss. Do that stuff and we can easily compete and win.