I've never 'taught' camping to anyone, but have given out some pieces of advice, when asked.
DW and I got into camping, with a tent, to have inexpensive vacations. The gear was more than paid for the first couple weeks of camping rather than staying in a room someplace.
We had to learn camping, making mistakes. Mostly, assumptions on weather and not thinking weather could change 30 degrees in a day.
We're not finding many people with an interest in camping. They're around, just not in my circle.