work on your walk outs with an empty bar or light weight. Unrack the weight then one step back for each foot, then go. You'll waste a lot of energy wiggling your feet getting them "just right"- not that you spent a lot of time on that ut you did do a little dancing..lol. Maybe keep your chest up little bit more. Put something under your ass like a step from the jazzercise room so that you touch it for a depth check, not a box squat just a light touch to keep the depth you choose honest.
probably the most important tip...use the other side of the rack. Staring at the wall or even worse a mirror is no fun. Put the j hooks on the other side and squat.
search for "wall squat" on youtube. That'll help with your form. hope this helps