Hi and welcome, let me help you out of your misery.
First of all you can check the "communities by area" forum stickies. Those are all guild ads, tho make sure the guilds are active before starting there. Lots of inactive guilds nowadays.
Biggest guild atm is TCW on CN1, which is a big fusion of expats that happenend when realm and faction change was made available. But they are on CN1, which may mean you'll have poor latency or not depending on your provider.
If latency is bad you can use a VPN that cost around 30rmb a month and will solve the problem. Check the 27net proxy sticky in the technical forum.
Other alternative is the Eclipse guild on CN2, dunno the current state of the guild but you won't need a proxy there.
When you log on a realm type "/join english
" to get in touch with the community members.
WoW English/Chinese glossary
(2000+ translated words) found on wow-in-chinese.jfs-web.chEnglish speakers are consolidating on the same realm for Cataclysm check this thread