First, we have to get the current administration totally out of power. So voting is a necessity. Then we have to be willing to work in the local community to achieve the things that are important in our daily lives. Have you ever tried to get a bill passed for the good of the people? It is a long and hard process. It takes years. I have been working on getting nurse/patient ratios set in my state and am amazed at what is involved.
If you don't think this is important, there are many studies that show thousands of deaths and preventablr complications could be avoided if nurses had time to take proper care of their patients. They are way overloaded. It may not seem to matter, but will quickly if you or a loved one gets in to a situation where you need close supervision in the hospital.
This is only one example. Choose something your're passionate about and get involved.