I'm from a small town and 11 years old, how would I pursue my dream in acting and/or singing like the School Gyrls.
A good start at your age is to join your school or church choir. If your community or school has a group that produces plays, sign up.
Thanx but we don't, so do I do now
You've bitten off a big chunk for what you want. The world doesn't hand out the rewards based on what you want, it's based on what you can do. The best way to learn to perform is to perform. Anywhere you can get involved will help.
You must understand that there are people running around Hollywood that have been trying to be discovered for an acting or singing career for thirty years. It's not where you live, it's a good amount of talent and work added to a huge slice of luck that makes it happen for the few who succeed.
I always found that this helped me get somewhat noticed http://howtofixstuff.blogspot.com/2012/01/how-to-become-famous.html
She was just a small town girl
Living in a lonely world
She took a midnight train going anywhereeeee