Go to localbitcoins, select how would you like to be paid.And choose a reputable trusted buyer.
Or you can try Zebpay app on playstore, but they require mandatory verification.They will ask for your PAN card,Address proof,bank details, etcetra.It will take days to do KYC verification.There is no need for verification at localbitcoins(albeit they might ask for verification if they suspect something suspicious, which happens very rarely.It won't be a problem anyways).
I would suggest you to use localbitcoin, since you will find many ways to get paid.(PayTm,BT,UPI) and you can sell in just 30 minutes
There is one more way to sell your bitcoins for a fairly good price, it involves trading of steam CSGO keys.If you have a steam account with CSGO then you can use it.PM me to know the method