can someone walk me through how to use this as a clan?

Hi! Basically I'm trying to figure out how to use this group effectively to meet up with other players to join raids etc. Can someone walk me through how I would use it to do that? -Would I make a new post to get someone's attention if I'm looking for a raid party? -is there a way to send someone a friend request on psn directly through the app instead of having to just copy down their psn id? -what's the quickest way to find other clan members who are looking for raid party members? -how do I make this my official clan (is there a button or something?) and what benefits are there to doing so? Thanks!