Template

Hi wwpress101. You can create a page template either from scratch and create the html/php structure manually. Or by copying a theme file like page.php into a child theme and renaming it. In either case put something like this at the top:

<?php
/*
Template Name: MyPage
*/
?>

Then “My Page” should be available in the Template dropdown.

Here’s a good reference:
https://www.smashingmagazine.com/2015/06/wordpress-custom-page-templates/