Never let your knees go past your feet. You’ll end up with some raggedy knees (been there, done that). Start with 50 a day. In just 3 weeks you’ll notice a major difference (if you’re eating well, of course!).
he best way to learn how to squat correctly is to do squats facing a wall. Bring your toes to the wall, almost touching, then sit down. Stay looking straight so you learn to keep your torso up. Sit as low as you can go then hold the seated position for 5-10 seconds and repeat.