Visit the Who We Are section of the UUA website.
Take a look at the UU World magazine online or in hard copy.
Explore the variety of brochures on Unitarian Universalism at your congregation.
Check out these books in your congregation's library or from inSpirit: The UU Book and Gift Shop:
Church, Forrest and John A. Buehrens, A Chosen Faith (Boston: Beacon Press, 1994)
Church, Forrest, The Cathedral of the World: A Universalist Theology (Boston: Beacon, 2009)
Frevert, Patricia, ed., Welcome: A Unitarian Universalist Primer (Boston: Skinner, 2008).