Fans around these parts have just figured out what to watch for in a pennant race, and now here comes the Nationals’ first playoff appearance. There are so many questions, and we’re here to help. Understand this about Major League Baseball’s postseason: Talent is often enough to trump inexperience. Although some key Nats — outfielder Jayson Werth and starter Edwin Jackson come to mind — have shined in late October for other ballclubs, there’s no denying the postseason is uncharted territory for most of their teammates.