I can't do this well, help?!

I can't do this well, help?

i can't get very low on squats and lunges, and i can't go down far without lifting my heals... what is wrong with me?

how can i get lower?

Start out with very low weight to get the proper form down and then start adding weight. You don't have to go all the way down, just have your thighs parallel to the floor. It is OK if you lift your heels a little. If your heels are always off the ground then that means your calves are tight. Stretch them before you do squats.