I assume you have already downloaded and installed Ruby. Here's what you need to do next: 1. Run gem install jekyll bundler. 2. Copy the theme in your desired folder. 3. Enter into the folder by executing cd name-of-the-folder. 4. Run bundle install. 5. If you want to access and customize the theme, use bundle exec jekyll serve. This way it will be accessible on http://localhost:4000. 6. Upload the content of the compiled _site folder on your host server.