If you're cooking well, almost everything is clean by the time you put food on a plate. If you immediately put leftovers away, the cleaning can be 100% done by the time you start eating
It's best to let hot foods cool a little bit before moving them to the refrigerator. They can be so hot that they'll warm up surrounding items, or in the freezer, you might end up actually thawing anything adjacent.
That really only matters if you’re putting quite a bit of food in the fridge/freezer. Think a large pot of stew. It’s more guidance for restaurants than people at home.
Most cooking shows or recipes make things too fancy. You can make many recipes with a pan, a spatula, a knife and cutting board. Prep, cook and clean in 10 minutes. Burgers, pasta with homemade sauce, chicken salad.
I can't even walk into mcdonalds and walk out with food that quick.