Your lower body looks good! your upper body, get lower, hang off more, and look the turn more. Remember, you're trying to get the bike as upright as possible by manipulating your body weight, which means you gotta utilize all that upper body meat too! You don't look bad though
i'm not sure why i was riding so upright instead of a tuck i think it was nerves really being it was my first track day, but when i saw the pics I asked myself why so upright it looks like i'm commuting
you are going to think that you are waaaaaay over for a while, when in fact you wont be. for a landmark, put your nipple up against the edge of the tank and put your forearm along the other outside edge. it is gonna hurt your neck at first, but it will get better. feel free to move your rearsets around to get comfy too. i used to think that they had to be as high and back as far as possible, and it was detrimental to my position.
when working on body pos, change only one thing at a time, and keep reviwing pics. maybe once in a while, you could get a buddy to follow with a gopro, or you can pay the trackside photographer a lump sum for a LOT of pics of a trackday. my local one gives all pics he gets of me at an event for $50.