When God gives us a vision, goal and purpose it doesn't always mean it's going to happen immediately. Sometimes that vision may take years to come to past.
In the Bible, there are many examples of this. The Isrealites took 40 years in the wilderness; Abraham had to wait for Isaac to born; David was a child when appointed to be King but it happen until he was an adult. Even Jesus was the promised Messiah from birth but didn't start walking in it until He became an adult. What do all these have in common? God had to them through a process to prepare them for the promises. If God had given these great men His promises prematurely they probably would have failed and the Bible would read a lot different.