Hi! I'm fairly new myself, but trust me, this forum is a great place to be.

It's been awhile since I last played X-2, but I assume you're talking about the practice core sphere? If so, head over to the passage to the left of the ticket counter/information booth. You'll see this little midget there, and from him you'll learn the rules of Sphere Break and get to practice the game. I hope I'm remembering this correctly...