Allright, I still doesn't work but we're getting a bit further. Now when I want to boot EmuMMC i get a black screen with a sideways error message saying:
Failed to apply 'nosigchk'!
*edit* and when I press 'power' to continue it says
Failed to launch HOS!
after that it returns to Hekate
Failed to apply 'nosigchk'!
*edit* and when I press 'power' to continue it says
Failed to launch HOS!
after that it returns to Hekate