First, read a lot of short stories. This helps you understand different styles, structures, and themes. Then, start with an idea that interests you, like a unique character or an interesting situation. Outline your story briefly before you start writing. For example, decide on the beginning, middle, and end. Also, practice writing regularly to improve your skills.
I'm not sure specifically which 'Livingston' is known as a writer of Christian novels. There could be many authors with that name. It would be helpful to have more context or to check in specialized Christian literature databases or libraries.
Christian writer novels frequently use religious symbolism. Take 'The Lion, the Witch and the Wardrobe' from 'The Chronicles of Narnia'. Aslan's sacrifice is a clear symbol of Jesus' sacrifice on the cross. They also tend to have characters that are on a journey of spiritual growth, just like the main character in 'Pilgrim's Progress' who is constantly learning and evolving in his faith.
Marilynne Robinson's writing doesn't strictly fall into the category of Christian fiction. Her novels delve into complex philosophical and social issues, going beyond the confines of religious-based storytelling.
Dan Walsh is indeed a Christian fiction writer. His stories typically explore faith, redemption, and spiritual growth within the framework of engaging narratives.