Live in nanny position - in the USA

Must have passport and be able to live in the US, in our home. Can be au pair arrangement.
Loving married couple of over 20 years is expecting a (surprise!!) late edition to our family. We would like to have someone to assist with the baby join our family as well. The baby is due in September, and we would like someone to start in August. We have a fairly large home, the caregiver would have their own private bedroom and bathroom and an additional room if they like. We prefer someone that can speak Greek and teach the child to speak Greek as well as Greek customs, when he gets older.
The right fit would enjoy to travel with us, blend in our family unit, and take care of our son like their own. We are flexible on schedule, position would not exceed 50 hours a week, free room and utilities including internet, dedicated car is also available to use.