english class

I am undecided whether I should take an english class with a community college(close to where I live). I really really need to improve my english speaking skills especially pronunciations and fluency, but I am not sure if the class will help. I've attended english classes before and most of them were not of much help at all.

I am wondering if self-learning/improving by watching TVs, visiting this forum will work better.

Any suggestions from your experiences? Millions of thanks in advance!