Whenever I write, I write what I find to be the way people are. I never use any symbolism at all, but if you write as true to life as you possibly can, people will see symbolism. They'll all see different symbolism, but they're apt to because you can see it in life.
I know that Oswald killed Kennedy. Now, was he pushed? Encouraged to do it by outsiders? Possibly. Possibly. Was he sitting down with Fidel Castro? No.
My tips for any budding actors would be to go out and see as much as you possibly can. Find the people you want to work with and be ready to hopefully make them want to work with you.