Squatting below parallel incorporates more gluteal muscles than a squat that's above parallel. I recommend starting off with a much lighter weight in order to perfect your form. Sorry to butt in.
Sorry I had to butt in as well haha. But you need more than squats to form a better glute. My top 3 favorite glute workouts are barbell back suat (ass to the grass), leg press, and barbell back lunge. Here is a routine you should start on now.