There is no easy fix for helping someone you love heal from their pain. That is a journey they have to take themselves. And the more they learn to walk on their path, the stronger they will be.
If you want to help, talk to them. Ask them what helps them as they learn how to heal. Ask them what their biggest fear is, see if you can offer them words that offer them relief. Be present, if they need a shoulder to lean on. Understand that it isn’t going to be an easy process, and know that your presence makes a great difference anyway.