I think a good first step is being more aware of what’s affecting your community and evaluating if you contribute to the problem, and how to lessen the burden or effects on others. Good question!
I agree with Saleana; it is important to first identify the problems facing one’s community and how you impact that problem. A next good step to take would be to look into different organizations that address that problem. They most likely will have somewhere to donate or volunteer in which you can actively take part in helping those in need.