You don't need to abandon the Play Store. Instead, combine it with a trusted APK downloader. Here is the safest, most effective workflow for Android 5.1.1:
Because Lollipop no longer receives security patches, you must be extra careful: Google Play Store Apk Download For Android 5.1 1 BEST
Google frequently updates the Play Store to match the newest Android standards (Android 12, 13, 14, etc.). Newer Play Store versions often require newer Google Play Services, which older devices like those running Android 5.1.1 cannot support. You don't need to abandon the Play Store
Installing the absolute latest APK on an Android 5.1.1 device often results in: Google frequently updates the Play Store to match
The Solution: You need a version that bridges the gap—modern enough to be secure, but compatible with Lollipop architecture.
A: Partially. Android TV uses a different Play Store variant (com.android.vending_tv). Do not install the phone version. Search for “Google Play Store for Android TV 5.1.1 APK”.
For security reasons, it is best practice to turn off "Unknown Sources" after you have finished installing the app. Repeat Step 1 and toggle it OFF.