The solution to overcoming fear of being wrong, is avoiding the need to be right. Journalists do this all the time by asking first the obvious, then the un-obvious question. Columbo, my favorite disheveled TV detective, would pose two conflicting sets of facts and ask questions trying to resolve them.
High quality content, and more and more of it, is your social media strategy. People share content, and comment on content via social media. No content, no sharing. Build your content first. Readers will share on their social media of choice. When Facebook declines they’ll share it on the next platform, be it Snapchat or Instagram or one we haven’t heard of yet.