Hello Denise,
Please follow these steps to create and use the template for your CPT
1. When registering the CPT, enable the option Page attributes
in the Supports tab.
2. Create a template file with the CPT slug in the file name. For example, CPT slug: job
file name: template-job.php
content
<?php
/*
Template Name: Job
Template Post Type: job
*/
get_header( 'review' ); ?>
content here ...
<?php get_footer();