How to make a light novel?

A story about a boy meets girl. Satome Yuto is a previous Hikikomori(Shut-in). Who wanted to change his life. He goes back to school and get a work. Days are in monochrome and boring for his life until he was approached by a girl named Alice. "Lets became a light novelist!" Alice invited Satome. Satome stepped to a colorful world with Alice. "Life is not that bad at all."