You are getting some good info there. Lets see if I can help some more. I'm in the training system at the moment.
After JEFTS you can spend some of your own money, tick the right boxes and the CAA will get you a PPL. It is not automatic. But the system will not let you do any fixed wing spare time stuff while going through rotary training.
Opt for pilot first, then Obs if you have any desire to drive whatsoever. I know a lot of frustrated people out there and you won't get a transfer. The piloting is probably the easier job anyway.
But as stated before, you are an officer first and then an aviator - thats what they like to hear.
I think you need to read up a bit more on what you want to do. No offence, but you sound very unsure about the whole process of getting in and how, where it is done. Get hold of the careers info and jump on the RN site which has a lot of up to date info.
Best of luck