The first order of business was not the preaching or the sending forth; it was simply being with Jesus. During those times of being alone and apart with Christ He revealed Himself to them in a deep way. They walked with Him, watched Him, and listened to Him for three and a half years. Just as importantly, they learned to walk with each other. They learned how to serve one another in love. When Jesus finally did send them forth to preach they actually had something worth sharing and worth listening to.
Your primary calling as a disciple is to BE with Jesus, because that is how you LEARN OF HIM. It is not learning about the Christian faith – that is a thing. It is not learning about Bible doctrine – that is a thing. It is not learning about Christian things or religious things or spiritual things. It is not learning about the Bible. It’s not even learning ABOUT Jesus, it is learning OF Jesus FROM Jesus.