Process of editing/animation Film Opening

During the weekend I started editing our film opening, since we just shot our "real" footage on friday night. This is my first time working with motion tracking and animating in After Effects and so I had no clue.  I found a tutorial on youtube on how to edit a cyborg eye. First of, I made layers of null shapes, playing with its width, density and colours. Then I place a keyframe for rotation and size