[@Ellri] You really need to read your old testament, 
[img]https://images-na.ssl-images-amazon.com/images/I/51TVDFQGMVL._SY344_BO1,204,203,200_.jpg[/img]
before you try getting into the new testament. 
[img]https://images-na.ssl-images-amazon.com/images/I/418XJJB4EML._AC_UL320_SR224,320_.jpg[/img]

We called them the "Black Book" and the "Red Book" locally at our LARP and they were our bible. Without the Mind's Eye Theatre book to start from I can't imagine anything in any of the other Requiem books making any sense at all. The MET book establishes all the basics of being a human before you apply the supernatural templates. More specifically the "lore" of a world in the MET book says it's the same as the real world. Just a little more shadowy, a little darker, a little more corrupt. 

Basically the lore in the Red Book is supposed to be more myth than fact: a hot mess of he-said-she-said bullshit. The Red book is largely designed to be "factually incoherent" in the lore department, presenting each side's opinion, because nobody's supposed to be able to accurately remember far enough back to know the truth. If you delve into clans and covenant books it makes a big deal of telling about the same events from different perspectives, and making a point of saying everyone thinks they're perspective is right even when no one's perspective is accurate. 

Now, I'm not sure if you used the LARP version (MET books) or the tabletop version, and I've no experience with the Table Top versions but the MET versions are phenomenally easy to work with in my experience. They have to be because it's for [i]live action[/i] roleplay.