Read Acts 16:1-5
Paul started off as Barnabas's protégé and learns from him. As soon as he gets the opportunity, he calls Timothy to join his group and starts to mentor him.
If you've followed Jesus for any period of time, there will be people who can benefit from your help, encouragement and experience. Jesus discipled and trained men to succeed him in ministry. As did the apostles after them. As Paul encouraged Timothy himself to do in 2 Timothy 2:2.
The church should continue to grow. If you want you ministry to have an impact, you need to invest time in training and encouraging and discipling other Christians. All Christians should be both disciples (following Jesus) and discipling (making followers of Jesus) – Matthew 28:18-20.
Pray for the younger members of the church and those who have not been Christians for so long. And ask God for opportunities to get alongside them to help them grow and mature in their faith.