You are capable of more than you know. Choose a goal that seems right for you and strive to be the best however hard the path. Aim high. Behave honorably. Prepare to be alone at times and to endure failure. Persist! The world needs all you can give.
Nothing in this world can take the place of persistence. Talent will not nothing is more common than unsuccessful people with talent. Genius will not unrewarded genius is almost a proverb. Education will not the world is full of educated failures. Persistence and determination alone are omnipotent.
My dad encouraged us to fail. Growing up he would ask us what we failed at that week. If we didn't have something he would be disappointed. It changed my mindset at an early age that failure is not the outcome failure is not trying. Don't be afraid to fail.