A vault for history studies

Hi, This summer I am going to start reading a collection of history books and I want to make detailed notes. So I was thinking of at least 3 main categories for templates (own files), people, events and organisations, so I can link them with wikilinks. But I have doubts about the locations, should they be tags or a file itself. Also, what other items should have their own files?
On the plugin side. Which ones do you recommend? At least one for the timeline.
Is there a way to change the relationship between files? Say I link a person to an organisation. If the person was one of the founders is not the same as if he was another member.
Finally, is there a subject, a career, a book, etc. where one can delve deeper into these issues, especially the abstraction of data and their relationships?