To get the Google Play System update, go to your phone's settings > security and privacy > updates > Google Play system updates. It will then check for any available updates. Then, it will give you the option to download and install the update. Keep in mind that your phone needs to have at least 30% battery because it will want you to reboot the phone after installing the update. The phone does this to finalize the installation and ensure everything is in place for a smooth and easy update process. Also just to make this as easy as it is possible to understand it does this to essentially finalize the update.
