Seek God, and just sit down and start writing. Practice. Then think of story/book ideas. Got a good one? Outline your "plan" for the book. How many chapters. The content of each chapter (what I mean by that is just a brief summary of each chapter, major events that take place, etc.), character names, etc. Then pray about it. Then just sit down and start! Remember you don't have to follow your "outline" exactly, it can be flexible. But it is a great tool in case of writer's block.