We are lucky at my Club in so much as we have 4 society referees who are club members and regularly referee on Sundays for the youth section. They have encouraged those coming through the referee route to join the society in order to benefit from the resources there but also for those who dont want to join, they assess other club referees and we hold regular meetings throughout the season to discuss good practice and events that arise. In my opinion it is important that younger referees are not thrown into club matches beyond their capability as this will disuade them from continuing. I dont know what existing structures you have at the club but it really needs an experienced referee, ideally a society member, to act as the referee's coordinator for the club and manage those coming through to ensure their effective development.