You can't download app from Google Play Store to your PC in a regular way, using a web browser. You will get an error: "Your Google account is not yet associated with a device. Please access the Play Store app on your device before installing apps."
Apps in Google Play Store are written to run on devices with Android or iOS.
But there are a several ways how to download apps from Google Play Store to your PC. What you can do is:
- Use some software emulators to make your PC "look like a phone".
- Use some APK downloader - as a separate app or web browser extension.
You have to download Google Play Store apps from your phone. But you will probably not be able to do so using a web browser, if your phone is not linked to Google account.