Olá João, bem-vindo a este fórum.
Welcome to this forum, from another fellow Portuguese citizen in Portugal.
I also exited before my zealous JW wife did, and what I can say is that everyone is different, and what works for some, doesn't work for others. You know your spouse better than anyone else in here, so work with that knowledge. In general, proceed with caution, because if preserving your marriage and family is important to you, you may want to take baby steps. Keep in mind that their pre-programmed brain can at any time turn against you and choose the cult instead, if they feel overwhelmed. Carefully chosen questions that arouse thinking mechanisms are usually a good way, especially if you don't make it sound as if you already have mentally checked out. The temptation to spill it all out and "preach" is great, but patience is paramount here. Also, keep an eye on external influences - your spouse may confide in another JW what's going on and they may try to undermine you and even turn her against you.
R.