Replacing the backup lamp can be done easily.
The light assembly need to be removed from the car in order to access the backup lamp. The light housing will pop out when you pry it with appropriate pry tool which wont damage the paint.
I have attached the replacement instructions as well as diagnostics for the backup lamps.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.