Are there any conventions organized in your neighborhood (for comics, gaming, fantasy, anime, scifi)? Those are usually a good place to find any Homestuck fans.
By the way, there's no need to crosspost in multiple subforums. You can just post in the subforum that suits the topic at hand the most, which in this case is MSPA.
And please avoid doubleposting/bumping your threads. Especially when your thread is only a day old, it's not like your thread has dropped very low in the overview of the subforum after one day, there's not too much activity in the MSPA subforum lately.
Other than that, it's a good idea to read this thread and take a look at some of the links that are provided there, especially the Rules.