Adding _includes and _layouts files to Jekyll directory

Question

I'm new to Ruby and Jekyll, and I've been following this tutorial on how to create a static-site. I've reached the part where we're supposed to edit files inside the _includes and _layouts folders, but those folders don't appear in my directory. There is however a _site folder with an index.html file inside it, and it looks like that's what's showing when I run the website with 'jekyll serve'. Am I supposed to add these folders and files in myself, or should I edit _site/about/index.html to match what the tutorial has?

Here's a picture of what my current folder structure looks like:

Answer 1

Yes, you should add those folders and files yourself. Copy them from the theme repo and skip anyone you don't want to customize / override. The default theme config created by command jekyll new is https://github.com/jekyll/minima

The _site folder is being generated on the fly, it reflects the result of the customization.