In French Polynesia, people drive on the right side of the road. Rules, signals, priorities are the same as in Europe.
There is only one essential precaution : drive slowly. Actually, the roads are often narrow and not always well maintained and may present some holes especially after heavy rains. and hairpin curves are often not indicated. Finally, pedestrians and even the two-wheel vehicles are carefree. You will meet on a daily basis people alone or within a group jogging in the middle of the road or kids crossing highways.
Don’t be in a hurry. Remain calm. You would not want to waste your holidays to save a couple of minutes !