If you want to advance yourself, do a barbell single leg deadlift for your butt.
It requires balance.
Your non working leg will work as a support leg,you can either keep the support leg on the floor all the time,or lift it when you come up.
I would say,start by keeping the support leg on the floor at first.
This exercise will work your gluteus maximus(Lower/middle),medius and minimus(upper glutes),hamstrings(back of your legs)Quads(front thighs)belly and back.
It is important that you keep your core(belly,back and glutes) tight during the movement and also keep your hips straight in line so you won’t tilt too much to one side