Expected time for newbie casters
Over the years I've taught a lot of newbies how to cast. Some are ready to fish later that day, others will not be for several more sessions on the lawn.
Most of the single hand instruction has been for coastal saltwater fishing purposes. Certainly not as easy as freshwater, although stream fishing for trout is far from trivial the demands on physical control and timing to put flies into wind and waves effectively to catch fish can be a harder challenge overall.
I would like to get a broad sense for what the general readership thinks about this topic, just for curiosity's sake.
If you wanted to set a guideline for training before taking someone fishing...