From what I remember, in order

Watching my mother cook

Begging my mother to allow me to handle a knife to cut vegetables or stir food. Also she taught me to crack/open eggs near the frying pan so it won't "break"

Getting into a Technology and Livelihood Cooking Class, the thing I remember that I haven't learned outside of that class is learning how to properly hold a knife and sharpen it, the various vegetable cuts and the effects of cuts on flavour, and using a toothpick to hold the shape of rolls

Reading a book called "Salt, Fat, Acid and Heat" as essential components of flavor. Helped me to stop making bland food lol because I used to be conservative with salt and fat and was making food that only tasted good to myself

Watching youtube videos of recipes and how to do stuff. The youtube videos helped me a lot