The first thing we must realize is that any change that occurred in our lives as a result of the Baptism in the Holy Spirit is not because we initiated the changed, but because God first invited us to conversion, gave us the grace, and we cooperated with that grace. We know that God is always the initiator. We know that we cannot do this on our own. Without God's grace, Pentecost would not be possible. Even our desire to pray is a grace from God.
Conversion is a multi-faceted task.
It's not just a religious conversion. It's an intellectual conversion, a religious conversion, an emotional conversion, a moral conversion, and even a socio-political conversion. The Holy Spirit is about the transformation of the entire person to the life, way, and person of Jesus Christ. At Pentecost, the apostles first readied themselves for the reception of the Holy Spirit by being deep in prayer between the Ascension of Our Lord and Pentecost. Of course, God had called them to this, so they responded in prayer.