1. Please add the given code in your wplms-customizer.php file in wplms customizer plugin :
add_action('wp_footer','select_points_on_load',100);
function select_points_on_load(){
echo '<script>jQuery(document).ready(function(){ jQuery("ul.pricing_course li:nth-child(2)").trigger("click"); jQuery("ul.pricing_course").removeClass("active");}); jQuery("ul.pricing_course li:nth-child(2)").addClass("active"); </script>';
}
Note : Make sure that your course purchase points will be at 2nd place in the price dropdown .
The above code will just make the 2nd elemnt in the dropdown to be preselected by default .
2. This is not possible as of now .
3. Please goto wp-admin -> mycred -> settings -> core settings -> presentation :
refer :
http://prntscr.com/90p46k