Mmm... Yui, I'm sorry I was wrong...
We can't make a forum but we can make thread...
To make a new thread is easy Just like your introduction thread when you firstly join this site.
Just click the forum you want to share. I mean if you want to share about the school lesson, we have bahasa indonesia and bahasa iggris forum. If you want to share some poems or paintings we have sastra and lukisan forum. And we have ngobrol apa saja to share everything you want. Then, you'll find "new thread" on the top of forum table in the left side. Just click it and start make a thread. That's the way and may it helps you...
Just try... I'm waiting you...