Hey everyone! I've been learning programmig stuff for a while and recently got interested in learning more about the hardware/systems part to be able to build my own stuff from ground up, take care of maintenance and be more independent when it comes to solving issues. It feels as though there are so many details and intricacies about everything and it's kind of overwhelming both because of the amount of information but also because I just can't pin out a starting point. Like, how do people even know so much about stuff going wrong on so many different OS or different hardware and how they work and which one is better with which?

So I thought I'd ask you guys for a hand in any way you might feel like helping. Maybe suggesting resources or giving tips on hoe you learn and keep yourselves sharp and up do date with stuff. Any tip is welcome and appreciated!