Hey:
GOOD equipment! Sports mode is a good alternative, and set your ISO to 400, if necessary, although in daylight, hardly. Read your manual beforehand, (again) and take it with you, with the required pages turned down. Learn two or three programs/features that you think you may use in your shoot. Next time, learn and try a couple more useful ones.
Is Tv "time value"? or "shutter priority" as known by that "other brand"?
Since this will be a "learning experience", try a little bit of everything, and keep notes , so you can tell what it is that pleases you the most, and can repeat it.
No sense in paying all that money for those marvelous features that brought photography out of the dark ages, and not use them, particularly starting out.
Start with Sports Mode, then try P, or program, then try shutter priority...anything from 1/125 to 1/500 will be sufficient to your needs. I bet 1/200-1/250 sec. will eventually become your go-to speeds for cheerleaders and similar subjects...it's what you like.
Then... aperture priority...Set your lens anywhere in the neighborhood of f/5.6-8-or 11, (a very
nice neighborhood, by the way.) and let the shutter speeds fly. Wait for it...every motion has a "stop": where the jump is at its height, and the body pauses...just for a little..before it starts back down, or the hesitation at the end of a twirl. You won't get it right the first dozen or three times, but keep at it, and you will.
Most of all, HAVE Fun! Photography is a magical pastime, and should be enjoyed as such. Good luck, and shoot lots! Pixels are cheap!