Photography is simply a function of noticing things.
You don't study photography, you just do it.
Covering a historic event is perfectly legitimate. It's not sneaking into somebody's boudoir... These people belong to history, and not to record that if you have the opportunity would be wrong.
The best things happen when you just happen to be somewhere with a camera.
Be sure to take the lens cap off before photographing.
I dislike landscapes. I only like people, and plastic flowers.