When I started this thread, I had in my mind to say that a Western trained rider wanting to learn to sit an English cut saddle and ride in an English style would find it very difficult unless there was a local instructor. The system has a different basis calling for a change in the way the rider sits and holds the reins. WIthout an instructor, the rider trained Western but a the novice at English, could jump up into the saddle and no doubt ride the horse without falling off but that when they did they might well learn to do "English" incorrectly. Instinctive reactions thereby absorbed by the brain would be very difficult to unlearn later. If someone wants to ride ENglish then please find an instructor.
I also said that an English trained rider could easily sit into a Western
Saddle but after an hour or so, that novice to Western would not be riding Western, they'd be riding English style on a Western saddle. They too would need showing the techniques of Western - by a good instructor.
But I would now add, that most of the English riders I know over here have absolutely no capability to use a rope or lariat - let alone use it from the saddle to round up steers. Neither would they readily offer to barrel race on a Western horse. Nor would they even think of sitting on horseback a whole working day herding a herd of cattle - there are easier ways to earn a living.
But whereas in the US there are still a lot of folks working for a living and using a horse as part of that work, there is little of that over here - except those folks working as instructors or perhaps as professional sportsmen/women. West Europeans gave up herding beef, goats and sheep with horses decades ago. The 4WD motor bike nowadays reins king on the farms. If we want to herd beef then we fly to the US, or Argentina.
Noone should ever say that the "English" way of riding a horse is better than the Western method. The two systems were designed for different purposes and they retain to this day their differences in more ways than the cut of the saddle.
I,ve been luckiy enough to go to a Rodeo a few times and I have watched those riders in absolute amazement. I have also always kept it quiet that I ride horses - just in case someone had the idea that maybe I should get up on the back of a cutting horse. I'd be off with a few seconds.
Enjoy your riding and your horse - whichever way you choose to do it.
In another thread I shall describe a typical early horse riding lesson in the UK.