Here are a few tips you might find useful.
Simply add Markdown files (or folders) to the blog directory.
Regular blog authors can be added to authors.yml.
The blog post date can be extracted from filenames, such as:
2019-05-30-welcome.md2019-05-30-welcome/index.md
A blog post folder can be convenient to co-locate blog post images:
The blog supports tags as well!
And if you don't want a blog: just delete this directory, and use blog: false in your Docusaurus config.