#1
So I got a new bridge humbucker and I looked at the schematics and I was like "cool, okey". Then when I looked at the wiring in the guitar I was like "wat".

So yea, I took some pictures and if you could help me with how I should wire everything together I would be very grateful.

This is my first time changing pickups.
I have one tone knob and one volume knob and also a three-way switch.

Dissonance is underrated.
#2
So what's the problem? And it would be much more helpful if you control ls post a diagram of how the guitar is current wired (and not how it SHOULD be wired).

The wiring thread (linked in my sig) may be able to help you a bit.
#3
You need to look at a SD wiring diagram for a 3 way blade switch and 1 volume 1 tone.

This is the 1 volume 1 tone 3 way diagram:
http://www.seymourduncan.com/support/wiring-diagrams/schematics.php?schematic=2h_1v_1t_3w

This is a 3 way switch translation to go from the one in the diagram (Gibson style) to a Fender-type blade:
http://www.seymourduncan.com/support/wiring-diagrams/schematics.php?schematic=3ws_trans

Then this is to translate from a Fender 3 way blade to an Import 3 way blade (like the one in your guitar):
http://static---guitarelectronics.app-hosted.com/media/img/guitarelectronics/-/diagrams/wiring_mods/3way_lever_switch_cross_refrence
Gibson RD Silverburst w/ Lace Dissonant Aggressors (SOLD)
Electra Omega Prime Ceruse
Fender Franken-Jag Bass

Amps and the like:
Laney VH100R
Seismic Luke 2x12
Dunlop 105Q Wah
Gojira FX 808
Line 6 M9
#4
The SD Diagram helped me quite a lot. Thanks!
Dissonance is underrated.