The good news is that the Holy Spirit is already at work in every person's life, even while they are living apart from God, helping them move toward God. In a word, Yes . God works inside the Church and outside the Church to call us to salvation. There is no knowing where or how you may come to repent, accept God's gift by faith, and experience the joy of God's grace. BUT that's just the beginning of your Christian journey.
Church members are all sinners, all on faith journeys.
Christianity is personal , but it dies if we try to make it private. God always answers our prayers. But remember, prayer is a way of listening for God's Holy Spirit to touch our lives. And if, right now in your life, all you can do is yell at God, go right ahead. God can take it.