Before embarking on my PPL I wondered the same thing, being left-handed.
In my flight simmming days (now the real thing has no substitute!) I bought one of those groovy force feedback joysticks, but was a bit alarmed that the grip was for a right hander, not a left hander.
My old joystick you could use from either side.
But I found that swapping hands, as it were, made no difference and now I can use either hand to manipulate the controls.
When I fly for real now I find that sitting in the other seat poses more of a challenge in terms of the spatial 'positioning' of the aircraft, rather than any real difficulty swapping hands on the controls.
Question - would a veteran Captain find it a bit weird flying from the F/O's seat after many years on the other side of the flight deck?