You should focus on the Bible itself. Teach the fine examples of great character.
Also, teach them how to use Greek and Hebrew root meanings to get a sharper understanding of the Bible.
Emphasize the Bible, deemphasize organization.
Next is teach them how to tabernacle with God, be in his company.
This way they will learn to be spiritually self-sufficient, not reliant on personalities or organizational social constructs designed for control and manipulation.
Individually we are saved, not by organization membership. Think of organizational learning is like school learning, you get fundamentals and breath of knowlege. But your real learning come for how you apply knowledge in the real world, on the job and inneracting with others in various ways.