Arthroscopy is an effective treatment for removing loose bodies, releasing stiffness due to soft tissue contractures and treating early arthritis. Risks of this type of surgery are low, though there is a small risk of nerve injury.
Following most arthroscopic operations patients can move the elbow immediately as much as comfort allows, and the small wounds will need to be covered with a dressing until the stiches are removed at about 10 days. Depending on the precise operation writing/dressing/using a keyboard should be possible within a couple of days and driving should be possible at around 3 weeks. Almost certainly physiotherapy will be required to maximise the benefit of surgery.