I had to think a little to answer. I don't know any book to learn to cook "as usual" (by the standards of my family for example). However, a good place to find such recipes could be a website called "Marmiton" , where people write their recipes , that are evaluated by the community. If you go for simple recipes, you should not be far from what I define as normal (with all my subjectivity: I understand this is not a valid standard)

I appreciate you taking the time to answer! I'll check out Marmiton.