First time here so let me know if I'm not doing things the right way...but be gentle with me please

I'm looking for help/advice on how to find out more information on
Giovannia Spolidoro born c1862 and his wife Caterina Destifano (various spellings) born c 1858.
They had a daughter Nancy/Nunzia born c1889 in Italy and then all came to Australia, arriving sometime before 1897.
Giovannia's Father - Pasquale Spolidoro. Mother - Nunzia Lombari
Caterina's Father - Francesco Destifano. Mother - Teresa Sammartino.
I have no positive birth place but think they spent time in Basilicata and possibly lived in Vigano (not sure of correct spelling)
I'm hoping some can help me find birth date and place of Nancy/Nunzia, when they left Italy and where the parents were born/lived please.
Thank you so much for any help
Raylen