See Understanding the GitHub Workflow.
git-exercise-1, add a file named 01-git-collaboration/01-quote/index.html showing the quote of your choice at the center of the page.See Fork a repo.
Make a pull request to this repository to add a Markdown file [your-name].md to the folder 02-git-collaboration/exercises/02-list-of-participants with a link to your favorite song and two lines about you if you would like to (note that this repo is public).