Complex sentence: The Radio Nepal fostered not only the indigenous musical talents, but also motivated several prodigious musicians of Darjeeling (India), like Ambar Gurung, Gopal Yonzan, Aruna Lama to come to Nepal and pursue their creative carrier.
Split into simpler sentences: The Radio Nepal fostered not only the in-country musical talents, but also motivated several prodigious musicians of Darjeeling (India), to bloosom in Nepal. They included Ambar Gurung, Gopal Yonzan, Aruna Lama to come to Nepal and pursue their creative carrier.