Including both mandatory content & optional/selectable content in a course

I need to create a course in which all users complete a first, more general series of lessons, then must select from a list of lessons that's appropriate to them, based on the state they work in.

For example, if I'm an end user, I go through the first few lessons that apply to everyone in the company, then, because I work in Georgia, I navigate to the Georgia lesson and complete that, then continue on to complete the quiz (also general to everyone). 

Or, because we have some employees who provide services across several states, they'd work through the first few general lessons, then because they provide services in Oregon and Washington, would select and complete both of those lessons before completing the quiz. 

We're a remote company, providing service across all 50 states, and we have employees who move across teams and service areas fairly often, so I want to try to balance a "one-size-fits all" approach with ensuring they know the specific laws of the states they work in. 

Is there a way to do this in Rise? They'd have to be marked complete without taking most of the lessons. How might I structure the navigation? Any advice much appreciated!