Tell us more about your OCs hehehehe
Ignoring the fact that I. definitely panicked when I first got this ask I'll talk about Protag here! They were initially a fill in for the player but has become her own character since.
Protag is the, well, Protagonist, of CDSWC/CompDatSim. While they mainly focus on coding and working with computers (they even do it for college), they've had experience repairing computers as well... ever since their childhood!
A very long time ago on a class trip, she spotted a busted computer and went on her own to investigate it. Out of curiosity, they opened it up and messed with a few wires -which is frankly a DANGEROUS thing for a nine year old to do- and managed to get it to work!
Pretty safe to say, it changed her life. She became fascinated with the inner workings of computers, though due to her not living close to any computer labs or owning one herself, they began looking into how arcade machines worked instead. Which was not ideal for the arcades (though GREAT for many arcade goers).
((I'm also now considering if this is where she got her love for games?))
Their family was eventually able to afford a computer, which means Protag was finally able to channel her interest in computers to the fullest (as well as gain an interest in software)!!! And that's where it all begins...