The EM Factor-e might not be considered a beginner machine (it costs too much for one thing) however the ability to calm it down with adjustable engine maps makes it very suitable in my view. As a rider gains skill and confidence they can increase the available power using the mapping adjustment on the app. The main thing for newbie riders is to ensure the lanyard is on as the bike(s) cannot stall and will continue to drive the back wheel after you fall off.
Electric bikes are not affected by altitude either.
Well worth getting a test ride if you can. Petrol is still a better option for road bikes in my opinion and may well be for many years to come, but for trials the battery bike is a very sensible choice.