The underground church starts in the family, the family is the domestic church. I encourage you to strengthen your family through prayer, especially the Holy Rosary. Study the catechism with other families. Get to know good priests, especially the holy and balanced ones, so that they can truly guide you towards holiness, and we have to pray to our Lord for this. Be prudent and stay away from unbalanced priests, especially those strange priests who see themselves as "Gurus."
In the setting of a clandestine church, back in my time during the Soviet Union, we had saintly priests, even though it was prohibited to say Mass publicly. We found a way; we set up a secret location with only a few faithful to worship the Blessed Lord in the Holy Mass.
These have been the circumstances in the Church for two thousand years. There have been Irish and English Catholics persecuted by Anglican Monarchs, as well as communist regimes in the Soviet Union and China. We have been through a lot of trials for our faith, but in those experiences, our Lord has been with us, assisting us even if we reach a point where we will become a clandestine church for the sake of the salvation of souls.
Dear visitors of Gloria Dei and all who have already written or who will write a personal message to me. I am grateful for your attention, your kindness, for your spiritual support and especially for your sacrifices and prayers for me. God may reward you!