I am researching my grandfather Giovanni Niro of Casalvieri, Frosinone, Italy. I am new to the site and NEED HELP in how to proceed.

GIOVANNI NIRO was born Dec 20, 1896 in Casalvieri
Married to a Lavinia or Marsella ?
Died 26 March 1976 in Hawthorne, Los Angeles, California
I believe his father was ...