How is the kingdom of God described in these first chapters of Acts? Have you seen anything like this in your own experience?

How is the kingdom of God described in these first chapters of Acts? Have you seen anything like this in your own experience?
What is the significance of Acts 2:17, “I will pour out my Spirit on all people,” for how the story will spread?

References
Perrin, N., Brown, J. K., & Green, J. B. (2013). Dictionary of Jesus and the Gospels. IVP Academic.