I'm a big sprawling guy, and I fly a Cessna 150. Sometimes when there
is hanging by a string weather (no turbulence), I move to the "middle"
seat and fly from that position-left foot on left rudder on left
side, right foot on right rudder on right side, left hand on left yoke,
right hand on right yoke. The 150 cabin is so small that it works fine
for cruise, and is a nice change for long cross-country flights.

I've tried flying from the right seat, buy only after I'm in the air
and in good weather. I think that would be the way to go about learning
right seat. I can't imagine starting with taxi, take off and landings.
Instead, I'd go through all the maneuvers in the air first: level
turns, climbing turns, slow flight, etc. (of course, that would only
work with an airplane where you can easily slide from one seat to the
other and then rebuckle--as you can in a 150.) Once I was happy with
those maneuvers, I'd try a take off, but not a landing. I'd not try a
landing until I'd done some power off stalls, turns around the point
and so on.

I'd think it would take about 25 hours of right hand flying before I'd
feel proficient enough to think of it as routine.