Also, the more you post, or post a reply, the more others will be inclined to join in.
Look what happened to this thread...it grew, just from folks identifying with the shyness in posting - but, y' know...we posted replies, anyway.
People are almost inevitably far cleverer than they think they are, and they have a lot to offer in their thoughts...they just have no confidence in what they know, or in their own opinions.
Posters and repliers are crucial to any forum...so...post/reply.