I lived thrice in Rosarito, B.C., for four weeks with my old aunt. It is south of Tijuana on the NR 1, at the beach of the Pacific. Wonderful small town with a good small library.
Along the main street and West of it you find a lot of American tourists and pensioners, but in the East there are solely Mexicans.
South of Rosarito lies the harbour Ensenada with a language school. Maybe a chance for you?
In both towns the culture shock can be disregarded. The people are extremely friendly to people from abroad when they notice that you are not an American tourist but interested in their land and way of life. A basic knowledge of Spanish is welcome.