The royal navy help the ministry of defence by help fighting with the conflict of war throughout the world, they protect Britain's seaways and the seaways of her colonies from attacks
That is an entirely personal choice. The Royal Navy is a military service and so you would have to be comfortable with that (discipline, being told what to do, possibly being required to go into...
England is only one of 4 countries which make up the United Kingdom - the others being Scotland, Wales and Northern Ireland. The Queen is the head of state for all these countries, and in general...