How to structure app workspaces

Hi all,

I am in the process of introducing power bi to my organisation.

We are a retail business and will have different users of the power bi dashboard (stores, regional managers, operations, finance, exec) and will have dashboards covering the following (sales, stock, customer feedback, logistics, etc).

We will have approx 300 users and are looking at signing up to power bi premium.

I have a few questions:

1) is app workspaces the best way to share the dashboards?

2) what is the best way to structure the app workspaces? Should we just have one app workspace or many? How do we split up the app workspaces? 

It would be great if someone can help me with the above questions.

Thanks

Mike