I guess it would be that I was curious about it when I was young and it was about the time when computers were making there way into the home.
The first one I used was a texas instrument home computer, then the TRS-80's from tandy, commodore vic20, timex sinclair, atari st, color computer 2, 3
And I just kept learning more and more over the years.
My biggest interest with it was being able to connect to other computers.
When I was 13 I made a serial cable from scratch, a 9 to 25 pin cable, to connect to my new 1200baud modem.
I also installed memory into my atari st , sounds easy, but you have to realize back then you had to buy the chips, and solder them one by one onto the motherboard.
I used a system called rtty to connect to other computers over ham radio gear, there was no internet at the time .
BBS use put my phone bill over 300.00 in one month and my parents nearly killed me for it 🙂
I eventually got an 8086 pc and stayed with the ibm-pc world ever since.
I went to college to be an EE so I got alot of technical knowledge there on the internals.
But the majority has been studying and reading on my own over the years and its just accumulated .