This year, I will have been a non-theist for 20 years. How about you?
My first word in Farsi was fes fes zu (meaning slowpoke). It took me a long time to break the chains of religion and it actually took one certain event to be the tipping point. Even then it still took a while to get to where I am now. My once, partner-in-crime, who was from a Moslem country but was a lifelong Atheist pushed me to my present level.
I was 13 yrs old when I examined Catholicism and all religions. I discovered and embraced logic.
Only 2 years for me. I wish it was longer! At least I finally got out!