Western riding is supposed to be relaxed and comfortable for both you and your horse.
Is Horseback Riding Difficult? … So, while just sitting on a horse may appear easy, learning to ride well is just as difficult as learning to do any other sport well. The Topendsports website lists horseback riding as the 54th most demanding sport, based on 10 components of athleticism.
Step by Step Horse Drawing Tutorial
There is no one answer but on average I would say 60 days. I have seen as little as one week, but usually the first 30 days to get the horse on board then add instructions the second 30 days.