Problem understanding where to put my code

Tell us what’s happening:
Describe your issue in detail here.
The example itself makes it a bit difficult to understand what part is which and where it belongs. dont understand where or how to place my code

  **Your code so far**
<html>
<body>
  <h1>CatPhotoApp</h1>
  <main>
    <section>
      <h2>Cat Photos</h2>
      <!-- TODO: Add link to cat photos -->
      <p>Click here to view more <a target="_blank" href="https://freecatphotoapp.com">cat photos</a>.</p>
      <a href="https://freecatphotoapp.com"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
    </section>
    <section>
      <h2>Cat Lists</h2>
      <h3>Things cats love:</h3>
      <ul>
        <li>cat nip</li>
        <li>laser pointers</li>
        <li>lasagna</li>
      </ul>
      <figure>
        <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/lasagna.jpg" alt="A slice of lasagna on a plate.">
        <figcaption>Cats <em>love</em> lasagna.</figcaption>  
      </figure>
      <h3>Top 3 things cats hate:</h3>
      <ol>
        <li>flea treatment</li>
        <li>thunder</li>
        <li>other cats</li>
      </ol>
      <figure>
        <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/cats.jpg" alt="Five cats looking around a field.">
        <figcaption>Cats <strong>hate</strong> other cats.</figcaption>  
      </figure>
    </section>
    <section>
      <h2>Cat Form</h2>
      <form action="https://freecatphotoapp.com/submit-cat-photo">
        <input type="text" name="catphotourl" placeholder="cat photo URL" required type="radio">indoor
        <button type="submit">Submit</button>
      </form>
    </section>
  </main>
</body>
</html>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Challenge: Step 43

Link to the challenge:

This is the example radio button element from the instructions.
It has the text cat.

<input type="radio"> cat

This challenge wants you to add a new radio button, with the text Indoor (that’s a space followed by Indoor - be careful with the capitalisation).

Your radio button element should be just before the opening tag of the existing input element.
You shouldn’t make any changes to the existing input element, so you’ll need to remove the type="radio" that you added to it.