You will need to understand the following processes:
Masks and/or rotoscoping
Look them up in the Help files and come back with questions.
When you want to learn how to do things take a close look at the scene and break it up into layers in your mind. In this shot:
A background layer, a text layer with lighting effects and a drop shadow, and a foreground layer with the girl and the car door. You've only got one layer to start with so you'll have to duplicate the layer, mask out the girl and the car door, then put the text layer in between the two and add the lighting effects and drop shadow.
Now that you've got that figured out you've noticed that the shot is moving so you'll need to motion track the scene (best if done with a 3D motion tracker) and apply the motion to the text layer and the light. You'll also have to apply the motion to the mask or animate it by hand.
The mask for this shot is fairly easy in AE, just use the mask tools:
Except for the motion tracking (and if you're doing this for the first time don't move the camera), this is everything you'll need to do the shot. You can see all of the properties that may need to be animated.
If you're completely confused at this time try starting here.