Honestly? I think the first thing you should do is learn more about the game before attempting to make a large FC. An FC thrives best when it has a purpose, since that gives a reason for folks to join and stay. If you're just making a large FC for the purpose of having a large FC, that's not as persuasive as one dedicated to helping newbies, or practicing cutting edge content, or RP. And as the LS leader, other people will expect you to be an expert in whatever area you choose.