How to align the paragraph and text into the center?

You have inserted the paragraph in the incorrect place in the code. it needs to go directly following your <img> tag and before the closing </div> tag which follows the img tag:

<img src="IMAGES/My story pic.JPG width="350" height="250" alt=""/>

<p>Hi everyone and welcome</p>

</div>

<!-- end main -->

</div>