i find reading a bout swimming very frustrating, every time you read something then go off and grasp that drill/ style the next thing comes along and you have to try to change to the "new " style.
i have the same problem with coaches,, i recently bought a watch that works out your efficiency number of strokes/ time then got told i was gliding too much ,,,,
forget breast stroke if it was worth doing all the triathletes would be doing it
but I still enjoy it especialy open water swimming,, still getting faster despite getting older,, 750m in 11.55 today