Besides the Galaxy Note 8, Samsung is also adding early 2017’s Galaxy S8 and S8+ to the Android Pie beta program. If you are in India and have either of those phones, you can register and participate in the beta program right now, according to SamMobile.
You will have to update to the latest version of the Samsung Members app on the phone, after which you will see the beta program opened up. The build numbers for Galaxy S8 and S8+ are G950FXXU4ZSA5 and G955FXXU4ZSA5 respectively, so double check those before you start the download.