Not only can you not plan the impact you're going to have, you often won't recognize it when you're having it.
When I was your age, we didn't have the Internet in our pants. We didn't even have the Internet not in our pants. That's how bad it was.
Don't always worry what your next line is going to be.
There is no script. Live your life. Soak it all in.
Believe that if you make courageous choices and bet on yourself and put yourself out there, that you will have an impact, as a result of what you do. And you don't need to know now what that would be or how will it happen because no one ever does.