I believe the staff on 55(R) Sqn at Cranwell run an introduction day; usually the last Thursday of the month. They will be able to give you all the latest information about recruitment and training.
As to qualifications, remember that the entry requirements for NCA are a minimum; half of the Chinook crewmen on my Flight are graduates. If you've set your heart on Helo crewman then go for it , but be aware that you are recruited as a WSOp and could just as easily find yourself as a sensor operator on a fixed wing platform.
