Complex sentence: He was confirmed by a Bishop in the Church of England, baptized by immersion in the Baptist Church and had the grounding in Bible teaching in the Plymouth Brethren while learning the plumbing trade as an apprentice from a man in the Brethren movement.
Split into simpler sentences: He was confirmed by a Bishop in the Church of England, baptized by immersion in the Baptist Church and had the grounding in Bible teaching in the Plymouth Brethren. All while learning the plumbing trade as an apprentice from a man in the Brethren movement.