Sunny side up eggs
Soups and vegetable stock
Spaghetti with oil, garlic and chili pepper
Wok dishes
Stews
Salads
There's plenty of recipes for either of these online, most use very cheap and very easy to get ingredients. They're difficult to get them to amazing level, but they're hard to screw up too. Just get to know your stove (don't burn your garlic), weigh everything and use a timer.
Some of them are so simple even a beginner can be a little creative. Like, you can add any herb or spice (mix) to sunny eggs, and it'll still come out alright. Or, you can fry mussels and dried basil together with the garlic and chili pepper. Some salads look terrible on paper but work really well, like canned tuna, canned white beans, fresh basil, red onion, olive oil, lemon, salt & pepper. You'll quickly learn which tastes combine well for you and which don't. Have fun.