Will give some small criticism based on just 1 minute footage: The footwork is not right The sense for distance is bad You can allow to keep your front arm down when you get good, if we talk about fighting - might even depend not only on how good you are, but how good your opponent is Learn to deliver series of left-right without leaning forward Going southpaw doesn't make it easier for liver shots, actually, your left arm will be further from the opponent's liver, not to say that the better liver shots are easier from an orthodox stance. I hope that helps, nothing negative is intended with my comment.