Complex sentence: Later she herself shifted to choreography, first as an assistant choreographer and later getting her break as an independent choreographer, with "Geeta Mera Naam" (1974), thereafter she went to become one of most successful Bollywood choreographers.
Split into simpler sentences: Later she herself shifted to choreography, first as an assistant choreographer and later getting her break as an independent choreographer, with "Geeta Mera Naam" (1974). Thereafter she went to become one of most successful Bollywood choreographers.