The current interest check is much easier to navigate than the current OOC. Hopefully you'll dress that up a bit too eventually.

I'll be honest, I'm not really big on playing in "multiverse" RPs. They come across as lazy and invite a lot of problems you avoid in single world RPs. As such there's little advice I can offer. But between moving to the casual section, putting up an interest check, and properly formatting it, you should see an increase in foot traffic. Also do what Odin says. Looking at other interest checks/OOC is a great way to get ideas for your own.