What a wonderful and wholesome discussion. I'm so glad to hear you're 13-year-old is getting into cooking. At that age, I took a few classes in school, extraordinarily basic, but it got me interested in cooking. But I was just allowed to do baking at home. It was decided that cooking took too many expensive ingredients for me to be practicing with, that making the mistake of not making a meal properly and everyone in the household would go hungry was less important than learning how to make cookies and muffins and cakes.
As a result, I didn't actually start cooking until almost 10 years later than your daughter. I started by watching a lot of programs on TV, not every program, just the ones that I found the most entertaining. And by entertaining I don't mean those bake off kind of programs in which you only have an hour to create some amazing spectacle of food, I just meant, one that I could stand watching the host, the way that they spoke etc.
I also perused a lot of magazines which have big bright colors, glossy pages, easy to read, in retrospect they're not really the best thing for a new cook because you can't tell the difference when you're reading through, how complicated something is, and it's difficult to gauge how many different tools and ingredients and time everything's going to take even though it's written there, a good cook can look at a dish or quickly skim a recipe and decide whether or not it's worth it to them. And you don't have that skill when you're inexperienced.
I'm not going to say cookbooks are outdated but they kind of are, I'm sure that your daughter has a smartphone and if not that she has access to a phone or a computer, and those really are great tools for cooks. You can literally Google a question like "chicken rice red pepper onion spinach recipe" (say that's what you've got on hand and you're not really sure what to make out of it) And it'll give you several recipes. They'll be too much choice and it is overwhelming, but if you take the time to pre-select about a dozen different online sources, one's in which you like the way it's written, the food is stuff that you like, and it gets high reviews, then you can limit your searches to those databases.
For instance, although I think that she might be American, there is a website that I really like called "spend with pennies" And aside from having to do a very quick conversion of measurements if needed, I found that almost all of her recipes turn out to be really good.
Good luck to your daughter on her culinary adventure!