Welcome to the site Research and well done on your research so far. You have probably made the first important steps to being free to live a normal life!
As you are aware the faintest whiff of heresy gets the elders alarm bell ringing and they will want start an inquisition, so take it easy and act cool -- you are asking honest questions and deserve an honest answer. However JW 'information' is never without bias.
As regards your mother, bear in mind that as with the elders, any suggestion that the religion is wrong is likely to be met with genuine horror. The reason is that the emotional anchor on which they completely rely is being attacked and potentially dislodged by your doubts, which is very unsettling for them.
As Cofty has pointed out you will be asked whether you believe that the organisation is under God's direction or words to that effect. If you fail this litmus test you will be excommunicated, so prepare you defence or avoidance tactics unless you are certain of the direction you want to go. Generally it's best to take things more slowly and fade out of the KH but we don't know your thoughts!
Do keep us updated.