You May Not Be Able To Save The Entire World, But...
You can influence some. Start small. Be kind. Kindness is the new cool.
What would you love to contribute with? To express, share and give to the world?
There is no point wanting to change the world, if you are not willing to transform yourself.
Once in a state capable to help others, start with those that seem like a good match for you.
If you are a girl weighing 60 kg, and there is a guy that weighs 120 kg that needs to be lifted, leave him to someone else.
Focus on those you would love to help.