Create a report using the "Course completion" report source and choose your required columns and filters (including Completion status and Grade columns and Course name filter). Set your content and access restrictions then view the report and filter by the three courses you want to report on. You can then save that search so it is easily accessible another time.

Hope that helps as a starter for you. 

Ian

p.s. you have posted to the Totara Social forum, you may find it better to post in the Totara Learn forums found here: https://totara.community/mod/forum/view.php?id=7019 :)