Complex sentence: He began training at the age of 5 with his cousins, The Gracie Family, and like all children took it more as a game than really as something he wanted to do for the rest of his life.
Split into simpler sentences: He began training at the age of 5 with his cousins, "The Gracie Family". Like all children took it more as a game than really as something he wanted to do for the rest of his life.