OP I was where you are about 10 year’s ago. I tried to be a Special Constable for Herts and didn’t get in. On reflection I’m glad as I know someone who works for Herts and some of the shit they’ve had to deal with...
Now I work for an organisation that’s related to the Police but isn’t an actual force. I am an office noddy, I don’t have to deal with anything “real” and the recent outcry over the George Floyd killing in the US touched every one of us and has created real distrust and division between all public agencies and the Police; the Met in particular.
If you are in London I’d advise against. If you are outside London to echo a PP I’d advise control room or being a Special. Do not be under the impression either that rural policing is all stolen tractors and lost cows; there are serious issues to do with organised crime and county lines shit that’s infecting the rural areas at a rate of knots.
I completely understand your motivations, I honestly do, and when I applied to be a Special I’d had some bad shit happen to me I thought would make me resilient enough to deal with some of the nasty stuff, but I know that’s not the case.
There are a multitude of agencies related to the Police and Ambulance Trusts you could liaise with if the desire to make a difference burns bright. Ironically I’d say that you are more likely to effect change if you do not work for one of the Services directly than if you did.
That’s just my tuppence worth, and whilst I’m here, all respect to the serving officers on this thread. It’s been an absolute nightmare time of late to be a copper and I cannot imagine how hard your job must be to know you’ve got zero support from the public, the government, and the arms length bodies that are related to you.