You could look at your own life experiences and find interesting moments or challenges to turn into a comic story.
Read other comics or watch movies and TV shows. Something from those might spark an idea for your own comic. Or, imagine a fantastical world and the characters that could live in it.
Think about your favorite hobbies or passions. Maybe there's a unique angle or adventure related to them that could inspire a comic. Also, observing people and their interactions in different settings can give you some ideas.