It’s not difficult but you need perseverance to just get your head down and keep a trickle of content going in the hope that it’ll gain momentum. That means you can’t worry too much about initially being the only one posting to your community and you should make sure you have your newsfeeds up and running, and well trained, to keep feeding you potentially interesting links. Also keep an eye out for enthusiastic posters who does be potential moderators - as someone on here said: you can make a good poster a mod, you can’t make a mod a good poster.