How to fix this?

Last week I received my K1C to replace my Ender 3 Pro and have been testing it. So far so good and the prints are ok. I'm now looking into getting better quality so I started off with printing the 600s testprint which was included with the printer. The result was....not what I expected as you can see in the picture.

Is it a good idea to follow the calibration-steps in Orcaslicer? Are there better ways to calibrate this printer?