Okay well, I've got to give you some advice then. Don't spoil Bloodlines by looking at guides or lets play videos. There's too much stuff you haven't seen yet.

You missed a lot, which is great because there's so much left to find.

That's great news then. At first I was exploring quite freely but then I was worried that I might mess up the game by discovering things ahead of the storyline (that happened to my in Fallout 4 and ruined pretty much the whole game for me) so I decided to stop and just discover things in the natural course of the game. I'll ensure I'm more thorough on my next playthrough then...