After reading up on it I think my main issues are mobility and balance. I have trouble keeping my weight on my heels at the bottom of the squat without falling backwards. A cue I got the other day from someone in the gym was to try and rock back an forth on my feet at the bottom to see how to properly move the hips to keep the weight on my heels. I'm going to try spending a few minutes each day trying to just sit, without weight, in a deep squat position, with my weight on my heels. I'll have to hold onto something in order to keep my balance in this position to start with. Over time, I hope this will increase my mobility so that squatting comes more naturally to me.