My father was, shortly, a short order cook. So we learned some from him. Mother was also an adequate home cook despite her thinking she wasn't. So we learned cooking from them.

I learned baking from teaching myself by "following recipes exactly and precisely" which usually worked. Having to follow the rules really helped for baking.

I still don't know why mothers friends didn't understand what preheating the oven meant!!!! Don't throw shit in there while it's preheating at least not cookies!!!