Brian,
There's nothing complex about them. No electronics, no really special spanners, you can fix them without a computer etc. The mechanics are simple, the parts are mostly easy to find and there is nothing you can't fix without looking in the manual and approaching it logically.
Driving is easy, the gear change pedal doesn't take much getting used to and the steering wheel is actually very comfortable. Don't expect it to drive like a modern car, but after a few miles you will wonder what all the fuss is about. Take it relativley slow, allow yourself room to slow down and make sure you unwind every now and then. Decent glasses or goggles and intercom headsets make driving fairly pleasant. Last weekend I did over 400 miles, mostly at 45-55 mph on A roads and motorways. The fuel bill was about £230 which isn't too bad, the worst thing is that the drivers seat starts to become uncomfotable after a few hours.
Chris