Tijuana is extremely diverse culturally. There are a high percentage of Catholics and many Evangelical Christians as well, in addition to an Eastern Orthodox church. Economically, the gap between the wealthy and the poor is more pronounced (vs. US) altough there is a strong middle-class, Mexico in general is much more class conscious than the US
Tourism, factories and business.
Make language acquistion a high priority--but not over taking care of you family's needs! If you know nothing about Mexican culture, working with a Mexican professional language tutor can really help you learn the culture at the same time. Be prepared that adjusting to a foreign environment can be very difficult--usually more so for spouses (typically SAHM) and takes up to 3 years to begin to feel a part of the community.