As we read these first two chapters in Acts, all eyes are on God. God was with them, moving, creating, changing things. Things were happening to people and among the people, and only God could do this. Not of human effort, but by human transformation through the Spirit.
So, in saying all this, we must appreciate how our text in Acts 2:42–47 is not a "channel change" — this passage is a continuation of looking for and reading about what God was doing. This community was forming and learning what dependence on the spirit was all about. What is obvious is that these disciples were following instructions and had opened their minds and hearts very wide, allowing the Holy Spirit to change them.