A sidestep is a visual manouevre, so if you are IMC at 1000' you shouldn't be thinking of a self position side step (and chances are even if visual I doubt any airlines stable criteria could be met)
So visual, asked to sidestep, AP off, FD off, bird on, go and land on the other runway. I would prefer the other runway already in secondary if using parallel operations, get the other person to activate secondary to get the missed approach in the box. Check missed approach altitude is the same, set accordingly on FCU. All in all not great to do very close in.