Switching ecosystems can be tricky, but planning ahead helps. First, use official transfer tools like Apple's Move to iOS or Samsung Smart Switch for smooth data migration. Expect some app compatibility issues; check if your favorite apps are available on the new OS. Back up everything, especially photos and contacts. Must-have apps can vary, but consider cloud services like Google Drive or iCloud to keep your files accessible. Be prepared for a learning curve with new features and settings. Best of luck!