I was about 13.
My parents had divorced when I was 9. During the next few years I was a boarder in a Catholic school, only getting back to one of my "homes" during the week-end, as the custody trials were going on. It was a very sad period of my life. I somehow believed in God, was afraid of hell at times, and couldn't bear the religion which was imposed to me while I was there (we were not churchgoers before). I refused confirmation as I didn't believe. I remember praying once in the schoolyard, something like "o God, if this is really what you want me to do, I'll do it. But it seems so faked. If there is something else, I'd like to know."
Some time later, my father told me he was studying with JWs along with his second wife. I shared in some studies, with little interest, until my stepmother invited us kids to a meeting. I expected to see something weird, and instead of that, simple and friendly people, no ceremony, no ritual. Everything seemed to be explained from "the Bible". It was so different from the church. When I came back home I got the book Make sure of all things and read it through. This very day I chose to believe it all. What did I really know? Very little. But I badly needed something to make sense. A few months later I was baptized along with my father and stepmother.
About one year later I had serious doubts... OK, I already told the rest of the story...