I'd suggest you prioritize your personal security. Once you have an income that doesn't take up much of your time, a place to live, a stable social circle, etc...then you can think about devoting your spare resources to causes.

The reason I'd make this suggestion is that personal liberty allows you to A/B test your decisions. If you set up a stable state and then experiment, and it turns out badly, you can just chuck the whole setup. If you throw yourself into a cause without setting things up for yourself and it doesn't work out the fallout can be considerable.