Don't try to find a whole fish, rather look for the fish's shadow against the bottom, a movement of a tail or fin, the opening and closing of a fish's mouth, the movement of surface weeds as a fish passes by, and the color of the fish's flank. Don't stare into water, rather let your eyes scan and roam from bottom to surface and from side to side. The key to approaching fish that may literally be within inches of the bank or weed edges is stealth. If I'm float tubing or wading really deep, I may choose a ten-foot rod for added line elevation and manipulation capability. Taking that foot or two from the rod length allows for better maneuvering, yet doesn't cost too much in the line manipulation department.
Leaders can be fairly simple.
I'd go shorter for quick casts when sight fishing. Although there are some spectacular damsel destinations available, you likely don't need to travel far from home to have some terrific fishing. Indeed, all you need to do is find a few damsels in distress. Braided monofilament dyed with magic marker to match body color and markings. Yarn or dubbing to match body color.