JWs are not really taught about grace, they are taught faith by works, they've even erased the word from their Bible and replaced it with undeserved kindness which is a very weird way to translate the feelings, mercy and salvation that the heavenly Father extends towards his earthly children.
When I was a witness that word was taboo, we disliked the sound of it, it wasn't a 'JW.org' word.
I really don't understand why they shy away from grace so much. Now that I have children, I can better understand how grace is the ability for a parent to extend pure love, forgiveness and mercy to a wayward child who repents, and even before they have repented, even if it was for murder or whatever. They just don't get it.