Often if you're looking for something specific and only want a single partner, it's best to make a post ^-^ Most people seem to respond to 1x1 interest checks, especially if you list a variety of ideas. 

If you're looking for group RPs though, I'm surprised you haven't found something :o You can look through the interest or roleplay sections, and anything with "Apply" next to it means it should be accepting c: Casual is where you'll find the most stuff, so if you're desperate, I'd recommend there ;)

If you need anything lemme know! Or if you wanna hit me up with an idea :D