My mother was raised as Jewish, and I was given a Bris as a child and was exposed to some culture in the form of songs and food and celebrating Jewish holidays (mainly at home or with my more observant uncle), but we very rarely went to temple and I only learned very little Hebrew. She converted to another religion before my Bar Mitzvah, about 25 years ago. I in essence became atheist/humanist over the years, I still self identify with the Jewish ethno-cultural group although my knowledge is admittedly limited.
Now I have a son of my own, I would like to know more about my own heritage so that I can address questions he might want answered. I am looking for a place or source of information, and am hesitant to ask a rabbi as I am not religiously observant. I understand that there are many differences in the religion, the ethnic identity, and the nation founded with Judaism at its base.