That's where I'm at. I mostly only commented on smaller subs that either don't have equivalents over here, or they don't have much activity. Never really posted at all.
All those communities need someone to kickstart them and get the ball rolling. Even if its just you using that community as a bookmark folder at first, it will be something. And then maybe someone else finds it, and they start posting, too. Suddenly you and this other person are having conversations. Now you have entry points for more people