Everyone’s foot positioning is different for squats. If you can’t do the traditional “10 and 2 O’ Clock” advice, don’t sweat it. Where would you plant your feet it I asked you to jump as high as possible? That’s your optimal squat stance right now.
Grip both hands around the dumbbell handle and keep it level with your chest. Squat down & back until you reach a 90* angle, your elbows should finish just above your knees. If your body allows you to go beyond parallel, go for it; but don’t bounce out of the bottom.
To power back up, concentrate on driving your hips forward and squeezing your glutes.