You haven't mentioned the grade of retrolisthesis. Grade 1 is not much to worry about. Where is the retrolisthesis?
Yes with the rehabilitation we have to make sure that your nerves to your legs glide well and there are not interfaces(restrictions).
Also do you have any weakness of your legs or bowel/bladder.
Next Steps
yes online exercises could help in restoring movement. Except for instability, hence caution with loading in the opposite side of listhesis. Sometimes this may require hands on to restore movement in upper spine.
However usually the recovery should be normal.....
you could have an online session.
Health Tips
word of caution with overdoing strenuous activity unless trained for it.