I started instinctive shooting, but once someone showed me string walking, it was just natural and enjoyable to go out to distance.
I never went bow fishing. What are the distances you shoot at?
Retriever I use holds about 25yd of 400# Dacron. The arrows are solid fiberglass with a steel tip so you don’t want to shoot much further than that anyway.
In tournaments you shoot numbers so a lot of guys run right up on the fishing shoot down, I like shooting the longer shots it’s more fun. Shooting down off docks I can blow thread minnows in half.
My best shot ever I was standing on the back deck of a 18-20’ boat, and shot a jumping carp in the head that was 15-20’ in front of the boat. Doesn’t sound far but a moving target with a very heavy arrow dragging water logged Dacron line is pretty good.
Shooting fish in the water you may have a couple seconds if you’re lucky to guess the lead, but also factor in how high to shoot above the fish to account for refraction on targets that may be 1-3” wide in some cases on a moving boat.
Most guys run about 35# draw but I shoot about 50-55 for longer shots. Also I’d rather blow through a fish that not penetrate and have the arrow pull out. I use a two loop system so my arrows come off/go back on the line real quick.
I shoot an Oneida lever bow. It’s a compound recurve with hinged limbs if you’ve never seen one. They work well for snap shooting, sometimes you may only have time to draw half way back and release so I think they are better in that situation myself.
This is going to sound stupid, but what I really think helped my instinctive shooting was a wrist rocket, it’s not exactly the same but you candraw that a couple hundred more times than a mid range draw weight bow. I got where I could shoot minnows with 3/8 bearings without using the fork, or looking down the band to aim.
I’ve never tried the method you use, may have to try it if I can start shooting again. Shoulder problems and archery don’t well. May just need a light poundage bow.