Here's the process:
1. Locate the interior hood release lever: Look near the steering column, often under the dashboard on the driver's side. It might be a small lever, a pull knob, or even a button. It could be fairly inconspicuous.
2. Pull or push the lever: Once found, pull or push the lever as indicated. You'll likely hear a clicking sound.
3. Open the hood: Go to the front of the car and carefully lift the hood. There might be a small notch or release under the front edge of the hood that you'll need to lift a little first before you can fully raise it. Sometimes there is a secondary latch that requires you to push or lift it once the initial release is activated from the inside of the car.
4. Prop the hood: Most likely there's a hood prop rod that will automatically swing out into place to hold the hood open. If not, you may need to support it manually.
If you can't find the interior release, check your owner's manual. If you don't have the manual, searching online for "1989 Chevy Celebrity hood release location" might yield images that help you locate it. If it's really stuck, you may need to gently tap around the hood latch to see if you can jar it loose. However, this approach must be done cautiously and should be considered only as a last resort.