Open the app you want to use for the live wallpaper
Select the live wallpaper you want
Tap Set Wallpaper or Apply
Choose Home screen, Lock screen, or both
Confirm the selection
Go to your device settings if needed
Open Wallpaper or Display settings
Select Live Wallpaper
Pick the live wallpaper
Tap Set Wallpaper
Choose where to apply it
Confirm and save the changes