Issue with nvidia driver installation at Jetson Nano

I am trying to install nvidia driver on jetson nano but unfortunately failed every time. Could you please suggest the best way to install the driver so that I can proceed with the deep learning libraries…

I am trying to install driver using

$ sudo add-apt-repository ppa:graphics-drivers/ppa
$ sudo apt-get update
$ sudo apt install nvidia-driver-396

but it is giving error unable to locate package nvidia-driver-396.

Also

ubuntu-drivers devices

and

lsmod | grep nvidia

returns nothing.