As a former salesman for ergonomic computer accessories (many of which were differed radically from the usual gadgets) I think I can give some sort of medical/physical information. Remember, I have no medical education added to that English is not my native tongue, so the terms I use may be incorrect. 
It will take a couple of weeks to make you 
remember that you should use pedals instead of twisty. The time needed depends much on your motivation, which I think in this case should be at a quite high level  

 .  Including those weeks it will take about three months for your nervous system to build new routes into your brain, after which using rudders is a routine operation and needs as much thinking as walking. 
BTW radically changing a routine to the level new nervous routes have been built helps postpone the symptoms of dementia, Alzheimer etc.