I started to research all available evidence that could support my jw beliefs, starting with evidence for God's existence, for example by looking at evidence for creation.
None found.
Then off to find evidence that shows the Bible must be a divine book.
None found, quite the opposite. So I put God to the test in many prayers, not unlike some tests described in the Bible, but without forcing God to pull a miracle. Either God failed the test, or I did.
By then I lost my belief in God and the Bible, but for good measure I started to research evidence that JW are Gods people.
Well...that turned out to be eye opening....
The whole process took 6 weeks. Well maybe I have been an atheist JW my whole life without realizing it, who knows?
Right now I'm reading C.S. Lewis' Mere Christianity to get a nonJW perspective on the whole idea. I find myself quite allergic to religious 'reasoning' where broad stroke assumptions and non-sequitur seem to be king.