Custom alert to learn admin for course or offering

Summary

Custom alert to learn admin for course or offering

Content

Hi Team,
Has anyone worked on Alerts for learning. I am trying to create 3 custom alerts for one of our client for the following scenarios but unable to get things moving:
Alert to admin when only registered to course (no offering selected yet)
Alert to admin when only registered to offering(course was selected previously)
Alert to admin when both course and offering are selected
I have used the following filters but no results:
- learnerLearningRecords
- learnerLearningRecords/selectedCourseOfferings 

I have created 3 separate alerts but due to the filter code 'last run' if the course is picked up ...the relevant offering is not picked by alert if offering is selected later after only registering to course.