Actually, this issue of who is driving on the best side is an old chestnut, but an interesting one, all the same. From history, one can claim that keeping to - or driving - on the left of the road, eg, as in a right hand drive vehicle, is the originally normal way. However, because in France, Napoleon decided, in the interests of speed and time, his gun-towing rigs and other military traffic could drive past the peasants, who kept left, and charge up past them on the right. The aristocracy then decided that if that was good enough for the military, then it was good enough for their carriages, and so no real surprise that when powered vehicles came on the scene, they also drove on the right. The French being right up there in the development of the car, the rest, by sheer weight on numbers is history. The Brits, on the other hand kept travelling on the left, and so naturally most of their colonies do also.
What I find interesting however, is I have often heard drivers who are normally used to driving on the right, ie left hand drive, find it easier to drive on the left, in a RHD vehicle, than those of us when we have to drive on the right, in a LHD vehicle - suggesting that keeping left is actually more instinctive..? I reason this may come back to back in the 'olden days' when folk had swords or pistols, etc, it is more natural to use those in the right hand, so steered with the left hand, and kept to the left, so their weapon was between them, and anyone coming by..? That's my theory anyway, and I'm sticking to it. 😊 🙏