Much of what we learn about fly fishing comes from instinct. Fishing, after all, is not that complicated. It does not take a special set of talents or years of study to figure most of this out for yourself. It just takes a tuned in, heads up approach out there on the water, and a good bit of want-to.
There are two ways to recover slack after the cast: stripping in line or lifting/moving the rod tip. Use both at the right times . . .