Here are some helpful tips if you are starting your first year at IISc Bangalore:
Ph.D. students have to be well-prepared to face uncertainty every single day. On numerous accounts, you are left on your own with no guidance at all. Also, no amount of guidance will ever be sufficient.
Even the Bangalore weather is very uncertain. One day it might rain heavily, and the following day might be a sunny one.
Hindi and English work fine but try to learn the local language. Many South Indians prefer dialogue in English or their local languages, so Hindi might not work in every scenario.
IISc Bangalore will challenge and groom you in numerous ways. Make the most out of your stay there.