Make sure you are using the theme version 1.2.2 or above.
The course information template located at this location – wp-content/themes/reptro/template-parts/course-info.php
You can copy this template to the child theme and override it. Do not make any change on the main theme, otherwise, you will lose it while updating the theme. On child theme template location should like this – wp-content/themes/reptro-child-theme/template-parts/course-info.php