You should neither learn coding nor computer science unless it is to become your profession or hobby. This is almost the equivalent of suggesting that everybody should learn to do a heart surgery, fly a plane or design a sky scraper just because it may come in handy some day. I am of course aware that some knowledge around computers is much more likely to help you out in some situation than being able to do a heart surgery but that is unimportant - important is the complexity of the thing suggested to learn. There is just no way you can learn anything interesting within an amount of time that is so short that it makes sense to suggest that everybody should just do it - not for doing heart surgeries, not for flying planes, not for designing sky scrapers, not for doing computer science, not for programming. And even if you could learn something interesting in say 100 hours, the equivalent of a dance course of two times two hours per week for six months, neither computer sciences nor programming would be a good suggestion. What people really encounter and ask there friends working in IT to fix are typical system and network administration problems - malware, crashes, network issues, (un)installing software, driver problems, configuration problems and so on.