Angle your toes out and push your knees out(where your feet point, your knees will follow)
Keep your head and chest up instead of slouching forward like you are
Try using a wider stance
Load some weight on the bar to help with balance
Take a deep breath into your belly before each rep
Look as "fat" as possible by sticking your ass backwards and belly forwards
Don't be afraid of letting your knees drift forwards when you use a somewhat narrow stance like you are, the important part is to keep your heels on the ground throughout the movement
Practice squats every day, with and without the bar, pausing for a few seconds at the bottom of each rep, holding your breath, and trying all of the above tips.
All of these things^^^ should help you.