I want my son to learn coding but he's not interested. How can I get him to be interested?

I think the best way to teach your son or daughter how to code is by exposing them to it. When they see that it's something they can do, they'll be more likely to try it. then that would be a good place to start. You can also try https://masterbundles.com/templates/presentations/powerpoint/business/ source to get free templates. You could also try starting up a blog where you write about what your child does in-between school assignments and afterschool activities, as well as share links to interesting articles about programming languages and tools.