It's not a dumb question~ You do need to make one post a month, but even for characters who don't talk much that shouldn't be too hard since we're all for action posts. That said, if you have one post that you've tagged 20 times? That'll clear you for activity. It doesn't have to be 20 comments in different posts, but it can be.

You could hypothetically pass activity with 5 unhackable filtered from everyone posts with your myPhone, but we might have to send the PTA (Perfectly Trained Assassins) after you then.

I hope that was clear enough! If not I can try to explain again.