As it's Disc Protrusion, So Don't Start any Exercises Your Self. Consult to a Good Physiotherapist and Follow Proper Exercise Plan for it. Your Treatment may Include Some Modalities also.
Next Steps
Use Lumbosacral Belt, Use Cushion at Back if Driving. Avoid Long Standing.
Health Tips
Avoid Forward Banding, Can Use Analgesic Gel, and Heating Pad for Relaxing Your Back Muscles.