There is a separate forum for the hybrid. Check this -> Hybrid battery air filter . Title says for battery filter, but information is there for coolant / transmission fluid service.
It is basically drain and fill for both (Engine coolant and Inverter coolant). I did it on my 2014 TAH. The hose connecting to the radiator and overflow tank might have some residue. Just clean it when you are doing this. Other than that, simple and straight forward. The link above have instructions on how to put car in maintenance mode for bleeding it properly by activating the coolant pump.