I think the horizon line would be at his feet and we are almost on top of it. Though with drawing figures you deal more with foreshortening than perspective.
I tried drawing it out but I'm not good enough yet. I can see you tried foreshortening the arm by extending the lower arm, which can happen if the viewpoint was on his shoulder looking towards the cat. Things going away tend to lengthen and things coming towards you shorten. (try it with your hand coming at your face (short fingers), or away from your face (long fingers)) But because the arm is seen from the side there would be little foreshortening. I can see where you were going though and for what you have the angle on the torso and head is good.
