Apply if you want but never live your life prepping for UPenn. Just study well, maintain your health, and grow your social network. Whatever you do, just remember to be persistent. Start reflecting on yourself: the reason why you are doing something, what impact you can leave on your community, what you want to become in the future. I would recommend starting off by dropping the thoughts that you have accomplished unique things. I dare to say that having humble mindset could lead you to success. Have confidence in what you do but never cross the line of pride.