Not exactly free, but if you dont know how to cook, or only eat the same like 3 things, meal kits like Hellofresh and others usually have pretty big sales where you can get food for pretty cheap. It's a bit of a scam because they say like "17 free meals" but they don't tell you its spread out over like 10 weeks. So your first box is half off, next one is 40% off, and so forth. BUT, you get to keep recipes that they send you, and then you can just get groceries from the store for like 50% - 80% the price.
Or if you already know how to cook and just want to dove in to recipes, they're all free online at https://www.hellofresh.com/recipes , I would recommend browsing through when deciding what to eat for the week.
I know exactly what you're talking about with the burnout and decision anxiety for new games that take hours to complete a tutorial or have paragraphs of menu text. It's not exactly the open world you're talking about, but I found Hard Space Ship Breaker to be a great alternative to that. It's got excellent lore and storytelling while still being a very simple game. Think power wash simulator, but breaking apart spaceships in a space trucker stop. It's simple, and each "day" is a hard 15 minutes, so you'll always have a stopping point in a reasonable time.