Meals based on basic ingredients are not very hard to cook. With basic I mean noodles, rice, or potatoes. Just throw one of that in boiling salt water and make a sauce to go with it. Tomato sauce is very easy, just chop some tomatoes and fry em with an onion and some garlic. Go crazy and fry some other veggies to put them into that sauce, like bell pepper for example, courgettes, or eggplants. Cheeze sauce is also pretty tasty, just cut a weak cheese in small pieces and let those melt in boiling cream. Season it with some herbs.
Or make salad. Chop some veggies, put it all in a bowl and make a vinaigrette (oil and vinegar with some salt and pepper, maybe some herbs and mustard, then whisk that entire shit with a fork till it's creamy).
Actually, I love simple meals very much. Like rice and beans. Could eat that every day because it's so flexible. You can add almost anything to go alongside that. Or cooked spinach with potatoes and fried egg. Delicious af.
When it comes to veggies, you need to understand to differentiate roots/tubers from solanacaea from salads from beans from cabbage, because they all need to be treated differently and have different purposes. But that comes with experience, you just keep cooking and experimenting.