I consider myself a feral atheist. I was born an atheist, just like every other person that has ever been born, and remain so 70+ years later.
I was fortunate that I was never indoctrinated (brain washed) by ignorant but well-meaning parents. What a cruel thing to do to a child. How obscene is it to make a child pray every night "if I should die before .... blah blah..." when in fact a child does not have a concept of death at that point in their life, but they are taught to fear it. How many children suffer the threat of a wrathful god, and they will burn in hell forever an ever if they don’t eat their peas or do their chores. That’s child abuse.
My parents sent me to a parochial school, catholic, because it was so much better than the public schools here. Students were a mix, about one third each, of Catholics, Jews, and us 'gentiles'. Religion was a class in every grade, and about the 3rd grade the class was split up where the Jewish kids went to a different class for their whatever stuff. Catholics and 'us gentiles' usually stayed in the same room.
I can still remember them going over much of the nonsense, and even at maybe 6 or 7, thinking WTF. A boat that can hold 2 of every animal on the planet, and feed them for months and months. Something don't add up here.
Prior to the internet/forums/blogs, etc. I never thought about being an atheist, I just was for simple reason the concept of gods or whatever is just nuts. I never thought about it, just like I never thought about any so-called god. I never read books about "being" an atheist, I didn't need an instruction manual, any more than I needed to read a book about how to walk, or breath. Nor did I didn't need to reinforce or justify my views (still don't).
For a while I got active on a forum where a lot of atheists related their story of how they became an atheist. Most of them were horrific tales, both from a personal standpoint, and then the family dynamics. Again, how I was raised "religion free" apparently saved me a great deal of anguish at some point, or worse, I would still be a slave to the willful ignorance that is religion, a fate I would not wish on anyone.
My wife is highly skeptical of religion, gods, etc., probably some residual of being raised by a catholic mother. Religion was NEVER part of our family, and raising our daughter. She "experimented" as a teen and dating boys into religion... but those were just test drives. Today no religion, probably atheist.
My grandsons were brought up much the same, and when the oldest was maybe 16, he was commenting about how he viewed the whole religion/god thing as nonsense.
The only times I have been to church was when it was mandatory when I was in basic training in the Navy with probably a 2-mile march to and from. Otherwise only for weddings or funerals where my absence would not have been cool within my wife's family.