Australorps & RIRs should be laying very soon, don't hold your breath for the Orps - they can take up to 28 weeks!
You will be surprised where they will park a nest - if you do find one, I would suggest 'cooping' them for a week or so with some fake eggs in the boxes to give them the idea...
If they look healthy and these are the first chickens on the land, I would not be overly concerned with worming them unless they look tatty and tired.
You could try a little extra protein by way of a beakful of black oil sunflower (BOSS) seed every night until they start producing, sit tight they will lay eventually