How to display chosen multi-select picklist values in custom object field without coding?

Background: I have created a custom object called "Programs" with a lookup to the Opportunity object in our org. When the opportunity stage changes to closed/won I created a process to automatically create a new "Program" record where the operations team can quickly find and reference their vital information to fulfill the order. I am creating formula fields to pull over this information they need but having trouble with a multi-select picklist field that contains important information about the experience chose for the specific program. 

Problem: I want to display the "chosen" multi-select picklist items on a new field in my "programs" object. There are 20+ options in the opportunity parent picklist field. I read in other forums that you can either create a very long formula field with a bunch of IF (INCLUDES) statements like this or write an apex trigger which I've never done before. Is there a workaround to achieve this in process builder or a different approach with formula fields? If not, do other admins attempt "simple" apex trigger codes to do this? 

Any advice or resources are greatly appreciated! 

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