I have highlighted Marjin Fratnik’s F fly series before. I think it is a perfect beginner’s fly pattern that has many variations in color, size and applications (caddis, mayfly, chironomid, stonefly). My only personal caveat is regarding cutting the ends of any feather. I would rather spend the time to stack/sort the feathers so they are uniform in length rather than trim them….just my personal choice. None the less, it is a simple tie and the CDC is magical. I am linking to the always helpful FlyForumUk for the step by step (SBS) visual tutorial on tying the F Fly.