How do I do this?

I want to be the someone- the someone that makes the change
and sometimes I feel like i'm going to keep pushing, and the doors will open.
But most of the time it seems like i'm nobody.
Just a 12 year old girl, in a wide, wide world.
Who am I?
There is so much wrong
with our world.
The innocent die,
The world warms,
The endangered become extinct,
There is hate, so much hate,
The people aren't equal,
and all I can think is that there is too much wrong with this world.
But I suppose, 
That if I had to choose, 
I would do my best
to right all the wrongs,
and convince others to join me.