Help with passenger's door handle/upholstery

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The handle on the passengers side door is malfunctioning and will not open the door. The handle inside works fine to open or lock.

I need to access the inside of the door to see what is going on but I am not sure how the upholstery is held on and or comes off. Anyone know how to do this without destroying the material and or?

Also I am making a guess that the handles can be taken off similarly to the ones on a truck correct?

Thank you in advance.