I understand not wanting to be dishonest. Many of us are hard wired like that. But if you want to maintain relationships, for yourself and your children's sake, I would use the fact your mother is unwell, quoting the bible verse about honouring your mother and father (Exodus 20:12) as a way of avoiding in person meetings etc
With time you can look for other Bible study avenues (David & Vivian Aspinal on You Tube, for example, you can contact). The one thing you can never, ever say is that you have doubts about the Governing Body. That will qualify you for immediate disfellowshipping on grounds of apostasy!