If you truly want to do more to help the world, here is my seemingly-counterintuitive suggestion: Do less.
Make time in your day for contemplative thought (such as Traveling at the Speed of Bike to/from work or at lunchtime).
Listen for your calling (it will come).
Itemize the steps needed to meet that calling.
Do those things.
But not too much at once, so that there is space in your day for both serendipity and kindness, since those are the moments where the magic is.
That’s it. Try that.
Everyone is needed. Your journey is unique. Let me know how it goes.