You won’t receive security patches or new features through the Play Store; you’ll have to manually download a new APK every time the app updates.
Keep Google Play Protect enabled. It can scan your device for potentially harmful apps even if they weren't downloaded from the official store. wwwapkprome full
Downloading a paid app for free (e.g., Nova Launcher Prime) is copyright infringement in most jurisdictions, including the US and EU. Even if you own the app on another device, redistributing or downloading a cracked "full" version violates the developer’s terms of service. You won’t receive security patches or new features
If you choose to use third-party sources, follow these safety practices to protect your device: wwwapkprome full