Self taught trial and error,Is gonna take longer if not a couple seasons.
Unless ur lucky.
But to be taught by a seasoned turkey hunter it could take less then a hr!

It took me 3yrs.back in the day,25yrs ago.To finally catch on to what i was doing wrong .Over calling,not setting up right,Moving,

Now i fill my turkey tags every year,
Sometimes without calling,
just by getting in close,
& using my hat to simulate a bird flying down by hitting it against my leg,And brought toms in by just scratching the leaves like a turkey raking the ground for food while im sitting there with a stick or my hand..