Lots of people ask how to join guild
You can find Guild presentation and/or recruitement Newfoundland here, Northisle here or Sandycover here.
Another way to find guild is:
if you want enlarge picture click here
If you are active player, you have branch office, you have 400coins to pay leader so he can add new member (if guild is not full, max 100)
and you like co-operative with guild and you send good application, Guild Leader probably invite you in guild.
Thanks for TingTong and quantum