Complex sentence: Before becoming a trapper, Belaney sought first hand experience to learn the basic skills of a woodsman and apprenticed himself to Bill Guppy, who taught Belaney how to use snow-shoes and the basics of trapping, including how to place several types of trap.
Split into simpler sentences: Before becoming a trapper, Belaney sought first hand experience to learn the basic skills of a woodsman and apprenticed himself to Bill Guppy. Bill taught Belaney how to use snow-shoes and the basics of trapping, including how to place several types of trap.