Micah 6:8 He hath shewed thee, O man, what is good; and what doth the Lord require of thee, but to do justly, and to love mercy, and to walk humbly with thy God?
If I am to train up new Christians, I would start with this verse from the Old Testament. Once you have accepted Jesus Christ as Lord and Savior the tendencies are to get right into His teachings, Who He was, what He did, how He did it, why He did it, and to use that as a roadmap of service. That was one long run on sentence and being a new born Christian those early teachings can feel just like that, a long list of things to remember and to do.
Here with Micah is a valuable piece of information. “What does the Lord require of you?” What are His expectations of you? The answer was simple, clear and not overly burdensome.
Do justly. The exercise of sound judgement has to be measured and without irrational emotions. You can only exercise as much right judgement as you have proper understanding.
Love mercy. Lean towards mercy in judgement until you are fully grown and have developed discernment over more complicated matters. Do not be hasty.
Walk humbly with God. Walking with God is absolutely the most important aspect here. Humility may not be the easiest thing to accomplish in being a Christian. See yourself as a small child that only wants to take His hand, that the hand hold is more important than anything. It is more important than your surroundings, your path, or your destination.
If as a new Christian you can learn this lesson, get it right, make it a foundation for training, then all that follows will become easier.