Please help me assest my structuring a page of content test

MDN Learn
#1

hello all, I wanted some help to assessing my test at structuring a page of content, sorry if my english is bad as it’s not my native language

<!DOCTYPE html>

<html lang="en">

  <head>

    <meta charset="utf-8">

    <title>Birdwatching</title>

    <link href="https://fonts.googleapis.com/css?family=Roboto+Condensed:300%7CCinzel+Decorative:700" rel="stylesheet">

    <link href="style.css" rel="stylesheet">

    <style>

      div {

        background-color: rgba(0,255,0,0.5);

        padding: 1%;

      }

    </style>

    <!--[if lt IE 9]>

      <script src="https://cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv.js"></script>

    <![endif]-->

  </head>

  <body>

    <header>

      <h1>Birdwatching</h1>

      <img src="dove.png" alt="a simple dove logo">

    </header>

      <div>

    <nav>

      <ul>

        <li><span>Home</span></li>

        <li><a href="#">Get started</a></li>

        <li><a href="#">Photos</a></li>

        <li><a href="#">Gear</a></li>

        <li><a href="#">Forum</a></li>

      </ul>

    </nav>

  </div>

    <main>

      <article>

      <h2>Welcome</h2>

      <p>Welcome to our fake birdwatching site. If this were a real site, it would be the ideal place to come to learn more about birdwatching, whether you are a beginner looking to learn how to get into birding, or an expert wanting to share ideas, tips, and photos with other like-minded people.</p>

      <p>So don't waste time! Get what you need, then turn off that computer and get out into the great outdoors!</p>

        </article>

    <aside>

      <h2>Favourite photos</h2>

      <a href="favorite-1.jpg"><img src="favorite-1_th.jpg" alt="Small black bird, black claws, long black slender beak, links to larger version of the image"></a>

      <a href="favorite-2.jpg"><img src="favorite-2_th.jpg" alt="Top half of a pretty bird with bright blue plumage on neck, light colored beak, blue headdress, links to larger version of the image"></a>

      <a href="favorite-3.jpg"><img src="favorite-3_th.jpg" alt="Top half of a large bird with white plumage, very long curved narrow light colored break, links to larger version of the image"></a>

      <a href="favorite-4.jpg"><img src="favorite-4_th.jpg" alt="Large bird, mostly white plumage with black plumage on back and rear, long straight white beak, links to larger version of the image"></a>

    </aside>

    </main>

    <footer>

      <p>This fake website example is CC0 — any part of this code may be reused in any way you wish. Original example written by Chris Mills, 2016.</p>

      <p><a href="http://game-icons.net/lorc/originals/dove.html">Dove icon</a> by Lorc.</p>

    </footer>

  </body>

</html>

Thank you and also sorry if I took your time