So in the bottom of the leg press, you knees are basically beside your ears?
Either this is a joke, the leg press machine is a bit fucked up, or your legs are far too wide.
The only way to improve you're squat is by practising. Watch videos, read books, and most importantly just do it. You can start off light to get used to the motion.
Get off the leg press machine and into the squat rack, and do it sooner rather than later.