Joining a new social media space is kind of like walking into a room filled with a few friends and a bunch of strangers.
You start off pretty quiet, trying to "read the room." Are there business/technical conversations going on? Political/religious discussions and debates? Drunken flirtations or whining about ex-lovers?
Everybody tends to start off quietly while they try to figure it out, but the key to a successful social media system is engagement, so I encourage you to engage.
POST!