How detailed should I make my geometry?

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I'm modeling a school building in sketchup to simulate in OpenStudio/Energyplus.

Is it feasible to model:

• Every room?
• A group of rooms?
• just one or two big zones in the story?
• Certain type of rooms?

Here are two of the floorplans of the building: https://imgur.com/a/U9t1OXv