If you have a short fictional story which you don't quite get, where on Stack Exchange would you go?
English Language Learners has a jokes tag.
This tag is for questions about interpreting jokes and understanding humorous wordplay.
While English Language and Usage has a joke tag.
Questions about humorous expressions, jokes, puns, etc.
Check out their help centres and other questions before posting so you know what they might expect. Given the differences in the tag descriptions it does sound like ELL is where you should be.