Welcome!
"First of all not to destabilize my parents"
This is such an important point. There are many people in different religions who define themselves only by their religion and would have nothing without it. In a controlling cult like JWs this can be even worse.
It is always a balancing act when trying to explain to adherents where their religion is wrong or misguided - some people just could not accept that they had wasted their lives in something that was untrue. For some people, I suspect, it is kinder to gently steer towards making appropriate progress in the 'real world' and away from the worst effects of shunning, etc., and hope that the worst effects of the religion are minimised rather than present a life-shattering volte-face.