I Don't Know How I Am Supposed To Change The World, But I Feel That I Am Called

I know it sounds weird, or maybe narcissistic, but I feel that i am supposed to change the world for the better. i believe that I am a natural leader. Right now, I have a job where I work like crazy. I work all the time. Its because I want to be the best and affect the most change within my company. I want to help the most people. But, you know? Why am I spending so much time at work? It is not helping me get closer to helping others in the way i want. I want to help others be better people. i want to help people become closer to God (not in a crazy way, but I do feel called to do this). I want to help more more people get to heaven. I know that sounds crazy. it sounds crazy to me even as a type it. But I want my existence to MATTER. I do not want to die and have people say. well, she was a really nice girl. I want them to say "She was the most amazing person who improved the world because of her contributions." 

The thing is, I don't know what is possible. I don't know what SPECIFICALLY I should be doing that will fulfill this hole in my heart for helping people. God gave me LIFE! I want to return the favor. I don't want to waste my life.

I just don't know where to begin. I don't know where my efforts will matter most.