Updated: Feb 12
First, get familiar with After Effects and the way this program works. Take a look at Adobe's basic tutorials. View - and do - at least the first three:
As you proceed and get started animating text, you'll also want to watch their tutorials: Create Visual Effects and Animate Backgrounds.
You will find these tutorials helpful as well:
After Effects in 15 Minutes by Premiere Gal
Definitely spend time seeing the possibilities before you start.
Work on your background!