If you want to start looking for a guild from scratch then here goes.
1. check out this link : http://www.urban-rivals.com/guild/list.php
2. choose a country of the guild that you want to join
3. then once the guild from the certain countries showed up in a form of a list, click the ones that catches your attention and then READ their requirements. YES it is important to read requirements.
4. if you fit their requirements then click the postulate button and wait for the guild admin's approval.
1. search through this recruitment part of the public forum for a guild that suits you preferences.
2. read their requirements
3. if you fit the requirements, go to their guild page then click on the postulate button and wait for the approval of the guild admins.
IN case the guild you liked isnt accepting any more members but you fit their requirements then DO NOT hesitate to PM the guild admins and ask them if you can join their guild.
I hope that helps.