I'm not rated on an A320.
The sim profile is not hard but if you never flown an Airbus (fly-by-wire) before it will be a hand full because there is no feel or feed back from the controls. I just have learnt that from my sim check. It is hard coming from a conventional instrumentation to glass. My ride was horrible. If I have one more go 15 mintues more at it I will nail it for sure. Once you have the feel of it you will be fine. I hope that the airline will look beyond my performance in the sim.
You will be issue a P2 rating not a type rating as SO but in the case as FO you will be issue with a type rating.
Good luck on your interview! Is it in London or somewhere else?
Cheers