Welcome: To the land of dream and let's face the the real life drama of America. You will manage it. Which subject you will be studying ? If it is pure science and you manage to get straight A, you may get full scholarship and you will be doing fine. But what the rest 50% and how you will be going to manage it?
Have you ever thought about it? Is your parents going to pay it or you are going to work in on campus will be suffice ? We do not think it will be enough for tuition but  you have pay for lodging and food too? Yes, it is definitely be the greatest day of life getting an US visa but you will see the rest as you enter.
Again welcome to USA and hope things shapes well with you and we will not be seeing your frustration as usual under your log in name. What ever we wrote, it is true but we manage it and you can manage it too.