What is considered ‘nutritious’ food?

I don’t have much experience cooking: how can I find cheap meals that are also good for me? Finding a go-to meal that is nutritious and cheap.

Note: involves elements of cooking.

How can I have healthy relationships whilst also establishing boundaries? How to identify red flags and know when a relationship isn’t working. Plus, how can I be safe in my relationships and who can I talk to when I need support?