Once you are sure of the diagnosis run, don't walk for the laparoscopic procedure. The longer you wait the risk of permanent damage increases.

I had the old style surgery (4" scar) done on my left hand immediately after diagnosis. Worked well. Full strength recovery was about 6 months.
In 1982 I had the procedure done on my right hand. I delayed surgery for 3 months. I permanently lost the feeling in the tips of my thumb, index, middle and ring fingers. Full strength recovery was about 6 months.

I have witnessed people after laproscopic surgery with nothing but a band aid on their wrist and basically go right back to normal activities.
No physical therapy involved.