I would recommend looking at static sites for learning the basics of building websites. There are a ton of static site generators in different programming languages. You'll be able to to build as you go and learn how the various parts of a website work together.

I recommend looking at jamstack.org as they have a long list of options.

Personally, I enjoy Hugo, a Go based static site generator. Though if you're unsure then try a couple out and see which you like best.