Mate, IMHO you should only commit to the RN (or HM Forces in general) if you are 110% sure of what you are letting yourself in for: great people, great travel, but almost zero scope for family life. Can you accept this?
I'm RAF and have trained with RN rotary pilots so I speak from experience. Also, bear in mind that with the RAF you can tell them what you want to fly but they don't have to give it to you.
You could end up flying rotary for 2 years, get chopped, and then not be offered anything else!
Caveat Emptor!