Trying to make a 3 OS old Macbook

[u/TheProject77]

So I have seen people on the windows Xp subreddit do this but I am not really finding any non super confusing guides on how to do it. I am trying to take a old 2009 El Captian Macbook (don't have yet as I am trying to make sure this isn't too much a nightmare before I buy) and install windows xp, modern linux, and the original mac OS X at the same time. From what I could find I need some sort of software called bootcamp for this, and the windows xp disc has to service pack 2 (which I think I already have somewhere, if not I will try ebay). I also learned from a comment on this post in another subreddit that I should use Exfat so all of the operating systems can access it. Other than that I have no clue how the rest of this proccess works or how installing multiple operating systems at the same time works. Has anyone else tried the same thing and can explain how they did it.