PS:
You should start with WT history not with God's name. Jehovah is an English translation and in other countries they don't use Jehovah but whatever the translation of the name in that country. Ask if WT was used by God from the start and was God's spirit operative upon it from the start? Then start with 1914. Why did Russell preach 1799 as last days and 1874 as Christ's return? Why did he preach 1878 as Christ taking power. If Russell was wrong about 1874 because KJ bible translation put them off by 100 years why then wasn't Christ's return in 1974 but in 1914? Why 607BC not 587BC? There is no proof of 607BC anywheres other than WT publication. Why did the pyramid point to all the dates that Russell taught and was believed to be God's witness in stone only to be labeled evil by Rutherford? Why did Russell change lengths of passageways in the pyramid in later reprints of Thy Kingdom Come and still came to the same dates as published in the earlier publications? If Russell was wrong about the dates he wasn't directed by God's Spirit.
I would start with that. Most don't have a clue about their own history and will have to research it. Thy Kingdom Come book is all you need. If you want ask more questions, move on in the history and go to Rutherford and ask how he was directed by God's Spirit?
Rutherford pointed to 1925, was he directed by Holy Spirit as he claimed? Why did Rutherford encourage reading Angels and Women when it was supposed to be inspired by a demon? Beth Sarim and Beth Sham. Where was God's direction there?
BTW you cannot be labeled an apostate since you were never a JW so all they can say is you're an opposer. 1914 is the key. That falls so does the entire WT deception.