How to best display microlearning on an LMS

Hello!
We've just started using the microlearning feature in Rise. We've created a course with 16 separate modules - each designed using this microlearning feature.

They look great and the user can instantly see what the course is about - because each part of it is now a bite-size piece of content. However, I'm now worried about how to display all of the course modules (published as separate SCORM packages) on our LMS without overwhelming the user.

An additional issue is that we've split the course modules into mandatory and 'nice to have'. My question is:

• How do we explain to our users that some modules are compulsory and some that simply are nice to have?
• How do we physically display 16 different modules? 

Thank you.