That is so great that you can connect with your family here!!
Have you checked to see that any of them speak English, many Italians actually speak a 2nd language quite well (though most of them downplay there skills...they are so modest )
If you are going to be in the Florence area...you could check out the classified ads in the English newspaper The Florentine. I know that they are many people in the area that speak English/Italian who could be of help informally.
Buon Viaggio - and family reunion!