You can really get a lot of “ammo” on the Jehovah’s Witnesses from Dr. Walter Martin’s book - Kingdom of the Cults.
And then there are Christian websites that specialize in cult groups, in which in which you can get a lot of information.
Their “Bible” is basically a “King James” version with a few key changes made to support some key doctrines they have. It’s called the New World version, if I remember correctly.
They’re more than happy to have long discussions with you as that just earns them more “brownie points” in their religion ... no matter whether you believe them or not.
I remember reading part of ‘Kingdom of the Cults’ a good while ago. Got it from a Baptist Church library when my GD was in AWANNA. Look for another copy. Thanks.