Get under the bar, place it on the meaty part of your upper back. Not on any bone. Lift the bar off the hooks and step back. Place your feet in a comfortable stance, one that is most natural for you, while you are learning. Later you can try different stances. Tilt your chin up, and find a spot on the wall above eye level, this will help to keep your back straight. Never look at the floor. With the weight in your heels, start bending your knees, hinging at the hips push your butt to the back wall and down. Knees stay behind your toes, and pointing in the same direction as your toes. Do not let your knees bow in. Go as low as is comfortable for you. Later, you can take it a$$ to grass. Hold for a second. Push through your heels, bring it back up, unhinging your hips, and straightening your knees. One squat done, nice job. Just keep practicing!