Damienmk, You will certainly enjoy the culture change from policeman to pilot. Well done by the way.
The point about your shifts is interesting. They are hard graft quite obviously. However . . . compared to airline shifts they are a bit shorter and more predictable.
You will understand the pilot perspective about six months into the job. The work is straightforward. The issues of managing safety in a commercial environment are the ones that will stress you out - particularly in a low cost carrier. They are not to be underestimated.
Your experience of life as a copper will be appreciated by your Captains. You will encounter many challenging operational situations as in your previous job.
Best of luck.