it will be expensive. automatics are more expensive to insure because it costs more to repair or replace an auto box, and the fact that the value of the car is high means that the parts are expensive to replace, therefore because you're such an inexperienced driver the risk is higher meaning that if you crash it it'll cost them more to fix. not to mention that despite the driver aids it's still RWD and you're probably going to make a mess of it on a wet roundabout.
also: i don't know where you got the 'the odds of a new driver crashing are so low' from, because the odds of a new driver crashing are very high.