The link you’ve provided is to FCC’s template.
Did you follow the instructions and save it so you could start creating your own pen? You must be logged into codepen to do so.
And to start the project you’d follow the user stories one at a time. For instance the first user story says
My tribute page should have an element with a corresponding
id="main" , which contains all other elements.
Tags are used to mark up the start and end of an HTML element. The following are paragraph tags.
An element in HTML represents some kind of structure or semantics and generally consists of a start tag, its attributes (if any), content, and an end tag. The following is a paragraph element:
<p>This is the content of the paragraph element.</p>
Hope that helps.