You need to go into your template directory. There should be a file called, “comments.php” you open that up in your file editor, whether you are in the WP dashboard or not it doesn’t matter.
You need to find where it says the following
<?php // You can start editing here -- including this comment! ?>
After that you can start editing. Everything after that shows the commentor’s name, url, comment, etc. You can also edit up the form to make it look different as well. All of that HTML code is in the “comments.php” file.