Complex sentence: Riffel did not go through any formal channels or study to be a chef, but applied a combination of natural ability and talent as well as learning from his family and the chefs he worked with, and his success today can be attributed to this.
Split into simpler sentences: Riffel did not go through any formal channels or study to be a chef, but applied a combination of natural ability and talent. He also learnt from his family and the chefs he worked with, and his success today can be attributed to this.