I thought subforums when i created this forum. But again the reason is the size and activity of the community. It looks like we need time to have users to post in the subcategory. But i would like to create "Funny things and jokes" (or some name like this) sub-forum while keeping this parent forum. If you can participate on that forum, i will too and we can be the driving force for the forum initially with a hope to have others participate by time
But if you can not post more than a few initial posts, i guess it is better to wait the community grow before opening a no-activity forum.