I'm trying to make this image sit central to the page (please click link below to see reference).
I've tried a few different things but nothing seems to be working. I'm sure it's something really simple but I'm new to this and need some help. Thankyou.
.homepage-image {
    display: inline-block;
    float: middle;
}
<!doctype html>
<html>
 <head>
  <title> shannonkelseyann</title>
  <link href="main.css" rel="stylesheet" type="text/css" />
 </head>
 <body>
  <header>
   <nav>
    <h1><img src="https://i.imgur.com/Nj06vm2.gif" alt="Image" align="right" height="65" width="650"></a></h1>
    <ul>
     <br><br><br><li><img src="https://i.imgur.com/c2UQ8om.png"></li>
     <br><li><a href="advertising.html"><img src="https://i.imgur.com/cQE71uK.png"></a></li>
     <br><li><a href="e-commerce.html"><img src="https://i.imgur.com/01tEvO3.png"></a></li>
     <br><li><a href="info.html"><img src="https://i.imgur.com/JjNQ54R.png"></a></li>
    </ul>
   </nav>
  <img class="homepage-image" src="https://i.imgur.com/O5ZNaft.png" alt="euan" width="30%" height="30%">
  </header>
  <footer><p style="text-align: center;">©2020 by shannonkelseyann <p style="text-align: right;"><img class="heart-image" src="https://i.imgur.com/Ql5LJ2c.png" alt="heart"></p></footer></p>
 </body>
</html>