I have a Nexus 5X phone running Android 6.0.1 and I am not yet getting Nougat update. Is this normal ? A lot of people I know already installed it.
Not everyone got it.
If you want, you can sign up for beta https://www.google.com/android/beta and you will get the prompt instantly, or you can get the factory image and flash it in fastboot: https://dl.google.com/dl/android/aosp/bullhead-nrd90m-factory-61495c8b.zip
This person explains it best, it is for an older version of android but I think they will use the same algorithms.
P.S. I still don't have it either.
You can follow this link https://www.google.com/android/beta and the steps are explained their so it should be easy to take from thereof