You have mentioned that you would like to start a nonprofit of your own. So do I and most of our friends here. The question again is where do I start? Then, there are innumerable ways that help can be passed. We have to start digging as to what, when existent now, can do the delta the world needs.The simple answer here is to start helping in all ways you can - volunteer and meet people. Charity Water also didn't start within a week. The man left his life and joined a charity organization(Mercy Ships), met people and got to know their problems - It all fit in a line, but took several years of hardship to him, but at the end lies all the satisfaction, right?. Then he has seen a solution and found the best ways to fill it.
One wise man said that "Every great idea is the result of a moment's inspiration". True and in addition I feel that every great organization is the result of hours of hard work on that idea. So, what you have felt is inspiration and what you need is time to find your great idea and then start working on it. Good Luck!