Hi D@NI€”L,
This dream definitely symbolizes the birth of a new ministry or the expansion of an existing ministry. The fact that you are thankful and glad about this speaks of this expansion or this new ministry being very close to your heart (important to you). The fact that the room is large and that there is a large window speaks of a big ministry (large room) and clear vision or spiritual insight (large window) and or transparency (large window).