Installing the Play Store app is a pretty straightforward process. All you need to do is download the installation file and then run it on your device. Make sure to enable Unknown Sources in your device's settings before beginning the installation.
Once the installation file is downloaded, tap on it to begin the installation process. When prompted, grant the necessary permissions and then follow the on-screen instructions to complete the installation. Once the installation is finished, you will be able to access the Play Store app from your device's home screen.