Hell no! There is a very large Dominican population in Boston, in fact there are 23 people just at the Dominican Consulate, only one of whom is officially recognized by the State Department, but that is a different topic.
Forty years ago you would have had to get on the train to NYC to get what you needed but now the local groceries have just about everything.
For cooking oil use peanut oil, it is by far the best.
Plantains are the one food that can be eaten three times a day with no regrets and it never spoils. It is eaten green, sorta ripe and very very ripe. All are wonderful!.
Since Chiri took what I was going to say, all I can add is go there and have fun. If you need help on anything just PM either of the two "aunts" that run dominicancooking.com or me, who is a better cook than either of them!! HEHEHE


As for music, just turn on the radio to the local latin station. That will help you learn the language. Your daughter will pick it up so fast!!
HB
PS I can fax you how to peel a green plantain!