I wasn't taught to cook, my Mum hated cooking and so we had weird things to eat for dinner, always something easy like toast or fishfingers.
My Dad could cook but it was all very traditional British cooking like pork chop, boiled potatoes and 2 veg. He hated anyone being in the kitchen so we never learned. Plus we didn't have any money to spare so you couldn't be trusted to cook anything in case it spoiled and there was nothing else. They also shopped daily. It was a nightmare pondering over what they fancied that night at 5.15pm.
My sister became a vegetarian when I was about 15 and so she cooked for herself, my Dad refused, and I learned from her. It meant I was self sufficient enough to cater for myself at uni.
Fast forward to now, I have a family and I learned to cook from watching TV shows of cooking, I am a visual learner and YouTube is amazing. Full of ideas that you can see, and how things are meant to look.
A slow cooker is amazing, a literal dump dinner. Batch cooking at the weekend once you know how to cook something will help you portion out individual dinners for anyone who has limited diets. Again, there are loads of videos on YouTube for batch and meal prep cooking.
It is daunting, start off slow with a couple of new things. Do it when there isn't a time deadline, so a weekend rather than a weeknight.