This theme has a nice filter hook to add or remove elements from the course header. Add the following PHP code on your child theme functions.php file and activate the child theme on your site.
Remove Course Meta Informations
/**
* Reptro Remove Course Header Meta
*/
add_action( 'init', function(){
remove_action( 'learn-press/content-landing-summary', 'learn_press_course_meta_start_wrapper', 15 );
remove_action( 'learn-press/content-landing-summary', 'reptro_course_instructor', 20 );
remove_action( 'learn-press/content-landing-summary', 'reptro_course_category', 25 );
remove_action( 'learn-press/content-landing-summary', 'reptro_course_ratings', 30 );
remove_action( 'learn-press/content-landing-summary', 'learn_press_course_progress', 35 );
remove_action( 'learn-press/content-landing-summary', 'learn_press_course_progress', 40 );
remove_action( 'learn-press/content-landing-summary', 'learn_press_course_meta_end_wrapper', 40 );
remove_action( 'learn-press/content-learning-summary', 'learn_press_course_meta_start_wrapper', 15 );
remove_action( 'learn-press/content-learning-summary', 'reptro_course_instructor', 20 );
remove_action( 'learn-press/content-learning-summary', 'reptro_course_ratings', 30 );
remove_action( 'learn-press/content-learning-summary', 'learn_press_course_progress', 35 );
remove_action( 'learn-press/content-learning-summary', 'learn_press_course_meta_end_wrapper', 40 );
}, 20);
Remove Course Price and Buttons
/**
* Reptro Remove Course Header Price and Button
*/
add_action( 'init', function(){
remove_action( 'learn-press/content-landing-summary', 'reptro_course_payment_landing', 45 );
remove_action( 'learn-press/content-learning-summary', 'reptro_course_payment_learning', 45 );
}, 20);