Driving on the opposite side from the UK, Japan and Australia means I need someone next to me repeatedly reminding me to drive on the right side, but the difficulty was reduced with every trip, and now it's just exiting parking lots where I need the reminder. The other mistake I kept making was looking to my top right to check my rear-view mirror instead of top-left, and turning the wrong way when checking my blind spot, but these faded with enough practice. I wonder how I go when I visit Australia and have to switch back, briefly.
When buying the furniture and kitchen items I needed I used rental cars and vans from Zipcar where I just paid by the hour. I really love it. Last week I got to drive a brand new Subaru Impreza with <250 miles on the clock. Plus, considering how rarely I drive right now, this works out to be extremely economical, and I don't have to even think about maintenance. Unless they're all booked out or I'm going somewhere with no parking, one-way car-shares like Car2Go (Mercedes cars) and ReachNow (Mini and BMW) are also convenient and cheaper than a taxi/Uber/Lyft.
This is another reason I love living in a large, modern city, and yet another way this place is an upgrade to my lifestyle.