Hi, please in future explain your coding problem in detail. Use the main body of the forum post for this, not just the title section. This is good practice and makes it easier to help,
First the list element is an example, you don’t need to copy and paste it into your code. It was an example of what indented text looks like. You also should not add another main element, a html file should only have one main element.
Second, this is an example of intended code. It means putting two spaces before the code to move the code to the right if it is inside another element.
<main>
<h1>Why I like cats</h1>
<section>
<h2>They are cute</h2>
<p>cats are cute and stuff.</p>
</section>
</main>