You can download the latest Play Store APK directly from the Google Play Store website:
Update Google Play Services and Play Store safely Google Play Store Apk Download For Android 5.1 1 BEST
Before you can install any downloaded APK file, you must tell your operating system to allow it. Open your device . Scroll down and tap on Security (or Apps on some menus). Find the toggle for Unknown Sources and switch it on. Tap OK on the warning prompt to confirm your choice. 2. Locate and Download a Compatible APK You can download the latest Play Store APK
Since Android 5.1.1 is an older version of the operating system, you need a specific version of the Play Store APK that still supports the "Lollipop" architecture. 📥 Direct Download: Google Play Store for Android 5.1.1 Google Play Store Apk Download For Android 5.1 1 BEST