We are all somewhat limited by the kinds of people following us. Many leaders are frozen with the sense of overwhelming responsibility for much that they only have limited influence over. There is a lot to learn in order to be an effective disciple of Jesus. I have found this pattern to be consistent with leaders across the spectrum. Very few leaders have had any lengthy cohesive path of discipleship.
Leaders provide ample opportunities.
Disciples hungry for more of God will drink. People become hungry for training as they spend time with those excited about ministry. Put a picture before them of what they are headed toward when their training is done. Training with no goal is very difficult to get excited about. To continue the horse and water metaphor, provide numerous watering holes.