@faehnrich as someone who only got into pcb design very recently, it's not *that* hard. Kicad can be a bit rough but is good free software, with a bunch of video tutorials around to show you around.
Then for the artsy stuff it's importing designs made in inkscape, and assigning them to the right layers to get the desired effect. due to a pcb's layered design you have some combinations of colour and height