It all starts with an encounter with God
This is where new movements always begin: an encounter with God. Look at Peter's calling to share the gospel with Cornelius and his community in Acts 10. It started with a prayer time and a vision on a rooftop. Or look at Barnabus and Paul setting off on a journey that would see churches planted across the Roman Empire. It started with an encounter with God during a prayer time in Acts 13.
Watch how a prayer walk at College of the Siskiyous led to a new ministry being planted: