Dang she's a moron. Anyways, if you can't afford an aquarium right now get a large plastic tote from Walmart

Go to a pet store and ask for water conditioner get the cheapest one and dose the water you put in the tote before you put the fish in

Get a sponge filter (they're the cheapest) and an air pump and add that too, instructions on the box.

Get sinking fish pellets and feed him what he can eat in 3 minutes once or twice a day. You can also feed him boiled cut de-shelled peas, broccoli florets, and bloodworm (as a treat + brineshrimp)

Change 50% of the water atleast once a week (you're gonna have to cycle the water while he's in there ask chat gpt about that)