I have had all 8 fingers operated on for trigger finger and also both hands for carpal tunnel. I tried the steroid shots for trigger finger several times.
The steroid shots are said to to be effective about 50% of the time. My experience is that they were a temporary fix and not worth the expense when surgery is still going to be the final fix.
My surgeon was very good. The incision is about 5/8" long from the callous pads to just across the 1st life line in your palm. Stitches come out in 2 wks at which point my Doc would bend and straighten the finger to it's limits. I started flexing and straightening my finger the day after surgery. Eventually placing my palm down on a flat surface and lifting the end of the finger to stretch it and manually forcing the finger down into a full bend.
The more you can work it early the quicker the recovery to full use, approx 6 wks for me. This summer I had a carpal tunnel and a trigger finger done at the same time, then 4 wks later the other carpal tunnel. 5 wks after that I replaced a rack and pinon and a steering column in 01 Buick. I wasn't quick but I had never done this before and wasn't out to set records.
When you have to pull your finger to straighten it out and it hurts bad enough the surgery is welcome relief. Good luck.