Enjoyed these posts a lot. Keep at it dirt worm. Sounds like you're thinking things through and figuring out your mistakes. In that kind of fishing avoiding mistakes is a big part of it. Stay out of the water as much as possible. Even cutting across a shallow riffle you grind the rocks underfoot and that can start a chain reaction of scared fish darting upstream scaring more.
Plan your approach 2 to 3 spots ahead. A lot of time it's wise to pass on a marginal spot to improve your odds at a better one. Also remember shadows, moving branches, sun reflecting off metal, light clothing or skin, rod tips, fly line, coiled tippet, drag on the fly, plopping split shot, strike indicators or dropping your phone in the water can affect things