Hi,
If the cable is broken, you will not be able to rev the engine. The only movement you will get is at engine idle speed. If you are on a flat surface, it should move at idle very slowly.
As far as the replacement of the cable, I attached the directions below specific to this vehicle. It really isn't too difficult of a job. Fortunately, this isn't a common issue, so this should be the last time you have to do it.
Take a look at the pics below and let me know if you have questions or need help.
Take care,
Joe
See pics below.
Images (Click to enlarge)
Sep 25, 2021 at 3:10 PM