Fanfiction.net is also a great option. Try using keywords like 'funny' and 'overprotective' in the search bar. Maybe you'll find a story where a character's overprotective nature leads to comical misunderstandings. For instance, a story where a superhero is overprotective of their sidekick and it creates all sorts of funny chaos.
Tumblr can be a source too. There are often fanfiction recs (recommendations) on Tumblr blogs. Search for tags like '#funny fanfiction' and '#overprotective characters'. You might stumble upon some great fan - created stories where the overprotective aspect adds a humorous touch, like an overprotective older sibling in a fantasy fanfic trying to keep their younger sibling out of trouble in a really comical way.