Healthy Food

What are some resources that help you learn about healthy food and how to be healthy in general?

I really want to learn about the following:

1. What all food gives you enough nutrients.
2. Which food gives which kind of vitamins, proteins, fats, etc
3. How many calories you should take per day based on your age, gender, height, and other parameters.
4. What do u mean by fried, non-fried food.

Like I'm literally a beginner as you can see.