This is from the Assemblies of God website:
Do Christians receive the Holy Spirit when they are saved? If so, how is this experience different from the baptism in the Holy Spirit?
Yes, when persons accept Christ, the Holy Spirit begins a great work in their lives. The Spirit convicts them of sin, convinces them of righteousness, and dwells within them (John 6:44; 14:17; Roman 8:9; 1 Corinthians 12:13). No one becomes a Christian without this gracious work of the Holy Spirit.
However, there is an additional and distinct ministry of the Holy Spirit called the baptism in the Holy Spirit. The Baptism is an empowering gift from God the Father that is promised to every believer (Matthew 3:11; Luke 11:13; 24:49; Acts 2:33, 38). It helps the Christian to live a holy life and also brings a new devotional attachment to Jesus Christ, making Him very real and precious. The primary purpose of the Baptism is to give greater power for witnessing (Acts 1:8). Other benefits include a greater joy in spiritual service, and a heightened sense of one's mission to the world.
I hope it answers one part of your question.