You want your <div>s and <p>s on the outside + your <img>s and <a>s on the inside:
Code:
<div class="social"><img alt="" src="../Images/instagram.jpg"/></div>
<p><a href="https://www.instagram.com/example">https://www.instagram.com/example</a></p>
<div class="social"><img alt="" src="../Images/twitter.jpg"/></div>
<p><a href="https://www.twitter.com/example">@example</a></p>