hi dude!
I learn before in ICLS (Inter Cultural Language School) KL Plaza...I think its cheap! some more the sensei is nohon jin...so you will learn exact slang...but me, useless huhuahahaha...only go to hang out with amoi lol huahahaha! In ICLS you can practice in reality conversation in japanese!
encourage you to look for nihon jin in Malaysia then make frenz...some sort like 'language exchange' but please dont get 'hook' with them, in Japan much more choices huahahaha...just kidding