For even the Son of Man did not come to be served, but to serve, and to give his life as a ransom for many.”
(Mark 10:45)

We are all expected to serve..... no exceptions.  Even when we feel limited in one way or another, the Lord will enable us to serve in whatever capacity He sees fit.  No, we are not all going to save the world.... but we can make a difference and those small acts of service will multiply beyond our own capabilities.