A comic about a clumsy superhero who always messes up saving the day would be funny. The contrast between the heroic expectation and the comical failures could lead to many laugh-out-loud moments.
You could do a comic about a talking fruit having adventures in a supermarket. It's simple and could be hilarious!
A comic idea could be a superhero who has a weakness for chocolate and always loses his powers when he eats too much of it. That could lead to some funny situations.
You could do a comic about a talking dog who always misunderstands human language and gets into funny situations.
How about a series of funny misunderstandings between aliens and humans in daily life? That could be a hilarious short comic. For example, an alien trying to figure out how to use a human toilet and causing all sorts of chaos.
One funny idea could be a superhero who has a fear of heights and always gets into trouble when trying to fly.
How about a comic where all the food in the fridge comes to life and has a party when the humans are away? It could be really funny and full of surprises.
You can start by observing daily life and finding humorous situations. Also, think about absurd or unexpected combinations of characters and settings.
You could do a story about a magical pet that grants wishes. It's simple and fun.
One way is to observe people's funny behaviors and expressions. Another is to play with stereotypes and give them a twist. Also, imagining absurd situations can lead to funny comic ideas.
You could have a clumsy sidekick who always messes things up but in a hilarious way.
You could have a story about a group of animals with human-like jobs in a big city. Like a monkey as a firefighter or a dog as a chef. That would be funny!