Well, one way is to introduce an interesting character with a unique trait or problem. Maybe a character with a strange power or a big secret. That can draw readers in. Also, you could set up a conflict or a challenge that the main character has to face right away.
A good hook for a comic book could be a cliffhanger moment. Like, show the villain about to unleash a devastating attack and then stop. That'll make readers want to see what happens next. Or start with a funny or unexpected situation that catches the readers off guard.