Ooooo I loved cross country in High School. :]
Basics of X-C.
You run long distances w/out stopping depending which team your on, such as varsity, junior varsity, and c-team.
It's based on your time on the first practice meet. If you do good, you'll either be on varisty or junior varisty. Don't
worry if your on c-team you'll eventually do better throughout the season. If you ever stop to walk, mostly likely you won't improve on your endurance and breathing. It only gets harder throughout the season. Even your
eating and fluids count as well. Eat healthy and drink plenty of water. No junk food.
If the coach catches you walking, he or she will make you run more miles. It's kind of crazy, but
it's so worth it. Cause it'll keep you in great shape.

From what I remember this is how the practice goes.
Monday- hard run/intervals (running hard/for sprints you have to be under a certain time/it hurts a lot like hell lol. i remember running 6 miles...)
Tuesday- semi-tempo (kind of hard run/no sprints)
Wednesday- hard run/ intervals (same thing for monday)
Thursday- semi-tempo (kind of hard run/no sprints)
Friday- easy run (the team/coach run together on a easy pace)
Saturday- race day (3 miles, compete against other schools, etc etc)
Sunday- FREE DAY

Then it repeats all over again.
Tips:
Don't eat junk food or fast food.

Cause it'll hurt your running.
Get plenty of sleep, eat healthy, drink plenty of fluids, take care of yourself, and have fun with your teammates.
Good luck to you if your ever going to join X-C. It's an intense sport with some crazy work outs.