To use raditian-free-hugo-theme you need to install Hugo by following https://gohugo.io/getting-started/installing/.
Create your personal website and run
> hugo new site <your website's name>
> cd <your website's name>/themes/
Clone the raditian-free-hugo-theme (git clone https://github.com/radity/raditian-free-hugo-theme.git).
Replace the "config.toml" file that in the project's root directory with themes/raditian-free-hugo-theme/exampleSite/config.toml
> hugo server -D
The theme is alive on http://localhost:1313/