I'm a newbie trying to get started on this route (OK with UK and Germany). First Quick drive is EMD GP-38 High Nose. Starts off in motion (in reverse) and high braking doesn't seem to stop it speeding in the siding. Slows and stops in due course but then throttle doesn't work (with train brake on 0%). Can't get engine brake off 20%, so that must be an issue. No academy teaching and I can't find anything online. Manuals only show the full controls - not the simplified newbie ones. I thought Quick Drive would help me learn the US locos but obviously you need to know before you start. Any assistance welcome. Thanks.