It doesn't matter if there are too many community websites or not... you should already have a goal and a plan when you bought the domain. It doesn't work this way. A business (even if it is monetizing a forum or a community site) needs a full plan to be executed and careful thought.
Having the name but not the goal doesn't look like the right way of doing things.
We have no answers for you... we can answer a specific question but what can you do with your site? what's best for it? How can I tell when I don't know what you would consider a good revenue... and what you're willing to do to achieve it?
This is like asking me "What can I do with my life?" I wouldn't be able to answer... your dreams and hopes are yours and so the decisions.
My only suggestion is that if you really make money in the long run and since it looks like you don't have a clue about where you're getting into, you search google about all the information possible about communities, forums, etc. and once you learn a bit, you decide if you want to do anything at all.