If I become a devoted christian and I pray vigorously?

I encourage you to read and investigate the holy books and writings of the world's religions to get a broader perspective on prayer. I believe you'll find prayer is more about developing your spiritual, inner life and the way you relate to others rather than delivering material items. We have to have material things to live in the world. We all can't have 51% of PG no matter how hard we may wish and pray.