It was a very good idea to need an experienced teacher to guide her in writing novels. There were many websites and platforms that offered guidance and courses on novel writing. These guidance and courses were usually taught by experienced people. If you wanted to find teachers on these platforms, you could search for relevant keywords such as "novel writing guidance","online writing course", and so on. A lot of relevant information would appear. He could also go to some literature community or literature forum where many writers and enthusiasts might be willing to share their experience and knowledge. However, it was best to make ample preparations before looking for a teacher. You can prepare some of your own novels to show your writing level and style so that the teacher can better understand your works and writing style. At the same time, he could also participate in some literary activities and make some like-minded friends in the community to ask them for advice. Finding an experienced teacher to guide him in writing a novel was a very important thing. He needed to be prepared in advance and actively look for it. I hope my suggestion will be helpful.