Welcome to the world of cooking fillup. There are indeed a lot of pasta sauces, and I could not shoose one, but well done for making yourself familiar with the kitchen! I make a simple after work tomato sauce that takes only minutes, I use small pastas, so it takes only as long as the small pasta takes to cook, I have two rings of the hob, to pots to wash, and its relatively healthy, and might suit you till you get more adventurous:
couple of coarsely chopped cloves or garlic, a little olive oil and half an onion to half soften on the hob, then a few coarsely chopped fresh tomatos to soften and heat through. I add to this an assortment of the following depending on what is in the fridge/ cupboards and what I fancy: capers, olives, anchovies, chili flakes, basil, oregano. I do it all on a highish heat, but the onion stays on the al dente side of cooked, and it tastes fresh and clean and healthy and warm rather than rich and deep. Its not what I make when I have more time but it hits the spot when I want quick and easy. I think this is the perfect fast, easy food.