We become like those we spend time with. That’s true both before we come to Christ and afterward. Your level of discipleship will be determined to a large degree by the sphere of relationships you develop and maintain.
God has encouraging friends he wants to bring into your life. Whether you are new to evangelism or an old pro, there are people nearby he wants to activate into your life who are going to help you grow. These people may be more mature than you and they will impart insights into the Kingdom in some way. Perhaps they are less mature than you and you will bring them along. I’ve had plenty of both types serve as catalysts. No matter—God will use both sorts of relationships to draw you forward as a leader in outreach.