Hulu does not have an official app on PlayStation 3. The PS3 Hulu app was discontinued in 2019 and removed from the PlayStation Store.
Buy a $30 Fire TV Stick 4K or Roku Express 4K+. Plug into TV HDMI 2. Done. You get Hulu, Disney+, Netflix, Max, Paramount+, Peacock, Apple TV+, YouTube — all updated, 4K, with a real remote. The PS3 is a great game console; let it be that.