That's great man, nothing like the first time at a professional ballgame, let alone at Yankee Stadium.
My first game was in '98, I saw the Yanks beat the Chisox with Boomer on the mound, and Bernie and Jorge both went yard. I've seen a bunch since then, and it's always terrific. Highlights are the Clemens/Piazza Beanball game and the time a couple years ago when Tino got a standing O after hitting 2 home runs...while playing for the Cards. Soak it in.