Joel suggested a great place to find training for up and coming small group leaders!
I would suggest one more page for resources HERE
Specifically the LifeGroup planning sheet that helps new potential small group leaders begin with the vision for their group. People perish for a lack of vision, direction, planning. Lead your leaders through this simple yet VERY effective planning guide to propel them into a healthy group with a firm foundation!
Prayers for you and your leaders! Go for it!