Family, elderly is where I always begin, their stories of the family usually holds true to the tree. Military records, birth records, marriage records, death cetificates, in America first, then you will have to get a genealogist in Messina, which they are not that expensive, ships manifest,if they came in at Ellis Island, which most of the Sicilians did from Messina, Sicily. The ships hold a fortune in record keeping of those who came here. So start at the root of your tree and bulid upward. I will give you the genealogist name in Sicily, So, you really can find a needle in a haystack, you must dig deep.
Johnnie, Happy Hunting.