Welcome to the game. Here are some tips for finding teammates.

Tell us where you live (Americas, Europe, etc.), so that we're not trying to find you when you're asleep and off-line.

Tell us your in-game knight name, if it's different from Garettea.

Stand in front of the Auction House. Try to find knights of similar rank. Ask people to join you on missions or Arcade runs. Don't beg them for it. Just ask once politely.

Similarly, consider joining a guild. Your guildmates should help you play.

Good luck. :)