Be part of something you believe in. So research and know more about it then start raising awareness and share your knowledge about it.

Example, some countries see kids with mental disorders specifically autism be institutionalized. In my argument, not all kids having this disorders are the same. They are capable of learning, on their own ways. Giving them individualized programs would better help them rather than have them locked out from the real world.

Change doesn't have to be big or small. Do something that you believe, then let process do its work.