Not heard of many moving from Pilot to ATCO, usually the other way.
As you're already 'in the business', so to speak, why not arrange a liaison visit to Swanwick or Heathrow to give you a look-see and an opportunity to ask as many questions as you feel the urge to ask.
Someone will, I'm sure, appear on this thread who works at one of these locations and will hopefully send you a PM with details of who to contact to arrange such a visit.
Good luck!
