Wanna put more focus on your butt? Follow these pointers:
Muscle to mind connection- butt, butt, butt
Hinge hips back very slightly befor starting
Keep feet planted to the floor toes in the same direction as knees
Decend down pushing your hips back
When you get as low as your range of motion allows contract your butt muscles and think about squishing your heels into the floor but keep the toes in contact with the ground as well.
Make sure you do not hyperextend when returning to starting position
Begin with low weight to learn the move correctly and be sure before you add weights you are able to do the reps in a FULL RANGE OF MOTION NOT HALFWAY
Take it slow and work your way to a properly performed full range of motion squat - then increase that weight!