Nah,takes about 10minutes to get used to it.The only real PITA is seeing past trucks when overtaking on the highway.Just gotta be careful.
I've never been to the US but mates who have tell me it's harder for us to drive over there(wrong side of the road to us) than driving LHD over here.
I wired up all the guages to form it's own harness.I then identified all the original wiring and connected it to the harness wiring via two aftermarket connectors.