If you have grandiose dreams of international competition, then if you're older than 8 or 9 then it's probably too late. If you're just in it for fun or recreation then there's no real age limit, though if you older than 20-25 years old you're probably going to able to do every skill in the book.
You can start in your teens. There's lots of examples of people who have on the Gym Chat message boards. You can find a gymnastics club near you on Gym Chat club listings/ratings directory.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.