I just kept the default value (I think its 0.2mm) between traces. I could probably double it at some points where multiple traces are bundled though. Thanks for the hint!

thanks for the imput. Do you mean I should just place some random vias to connect both sides of the ground plane? To be honest, I dont understand exactly what this ground plane is used for since none of the traces actually connect to it. Is it merely for shielding against signal noise?

Hey, unfortunately erdogen, which I used to generate the starting point for the pcb does not generate a schematic file. It only generates the PCB and ratsnest for the footprints. So I dont have one. I think I could create one though. Mind telling me what this is used for and why one should have one?

fixed the domain. thanks for pointing that out!

If you are interested in the design process, I can highly recommend the tutorial series by FlatFootFox here. It was a great resource for me to get started. https://flatfootfox.com/ergogen-introduction/