[@NesyExecutive] As someone who joined the forum right after I turned 14, I feel your pain. 

I was used to forummotion and proboards sites, which from my experience were set up for writing pretty much only 1x1's. 

I'm not sure if you've tried writing your own interest check, but I would recommended that as well as the earlier recommendations of checking out the group RP's. 

While the majority of the forum does appear to be adults, there are quite a few underage people as well. And no, not everyone is looking for smut. Some people just aren't comfy writing with someone so young - which is neither parties fault. 

The reason I'm recommending group RP's so much is because that's where I got my start. You have a really new account. Not many people know you yet. We don't know you personally, your writing style, your characters... nothing. Groups are a nice place to try and make a name for yourself. After you've done a group or two and people can look at your profile and see what sort of writer you are for themselves, this may help you get a few partners.