A mixture of an inventor-engineer (yes, there is such a subgroup) and a software engineer?

Question

IT education

Good day!
There was such a question. I do programming. The option of not only virtual development became interesting, but also the creation of something tangible, so to speak. Simply put, the invention of something that can be touched. What knowledge and skills do I need to acquire (besides the ability to google, I'm sure someone will want to write about it :)).
As a very rough example: what you need to know and be able to assemble a computer and make it workable, literally from scratch (well, or with minimal ready-made equipment).
To be honest, I could not formulate this question for a very long time, but still there are probably enough inaccuracies here. So I apologize in advance. I will be grateful for any answer.

Answer 1

easyelectronics.ru

Answer 2

https://toster.ru/tag/electronics/
https://toster.ru/tag/circuitry/
https://toster.ru/tag/microcontrollers/
https://toster.ru/tag/system-programming/