learn english

can anyone said that why hk people learn english for the whole life, more than 20 years) but can not speak english well (that is me, and some my friends, may be worse) so how can I get my son english better (i have no money to study at IS school), even we just want to watch the cartoon, if there is no subtitle, we don't understand.

many people would say that we have no english environment here but you see some places (like shanhai or peijing) in China, there is good english speakers there.