nice work man! i actually liked the color grading quite a bit; it was a little extreme but it worked.
when you're shooting interviews, it's a good idea to seat your subject first. this will stop your subject from swaying if you have a nervous subject (like this kid). next, frame your subject on one side of the frame or another (rule of thirds). if you frame your subject on the right side of the frame, you're going to want to move your camera so that it's angled. instead of having the camera pointed straight on to his face, you want to move your camera about 20 degrees or so to the right. then, leave your camera there and stand directly in front of your subject. have him look directly at you when he's answering the questions. although he is seated on the right side of the frame, he should be looking to the viewer's left, and the fact that his voice is moving in that direction will 'fill the frame.' you also may want to get tighter on your subject, more like chest up. all that will give it a very professional feel when done correctly.