Are you telling me one does not need an EE degree to make hardware like this? How do high school folks have access to resources / mentorship to make such a polished product?
And finally https://www.youtube.com/@PhilsLab has some good tutorials.
Finally, goo into things with an attention to detail to polish a board. A hobby board takes far less time than a product board, but all it is is time and thinking about each attribute more. You don't need third level education to have that work ethic.
Best of luck!