In HKG, where to learn English? my English is about Form 5

Courses from 英國文化協會 are good in terms of quality consistence. Its fee may be a bit higher but on other schools the teaching quality is really go by chance.
www.britishcouncil.org.hk

For free English chats just go to any pubs from Wanchai to Central every evening. Open up yourself talking to strangers and you will see imrovement within weeks.