I learned circuit design and went from not knowing what a ground plane was to having an 8 layer board working in three years.
https://GitHub.com/oro-os/link
It probably wouldn't hold up super well to professional scrutiny but everything on it works.
I would not have been able to do it without companies like JLC. It made an entire industry approachable, which is old fashioned 'good business' IMO.
Can you talk more about the design of the board?
Also, what's that large five pin connector in the bottom left for?
I absolutely love your project and I hope it will become a breakout success. It has all the right components for a computing environment that is not controlled.
Have you thought about RISC-V implementations of the kernel as well (iirc you're on ARM and on x64)?