After lots of hassle, I finally made the printer work.
I also got myself one bed leveling sensor from eBay, LJ18A3-8-Z/BX 3D Printer Inductive Sensor Bed Auto Level +Plug For Anet A8 A2 A6.
I'm not sure how to setup it. Should I print some holders for it first? Where are they?
Should I somehow update the firmware?