I am not a native English speaker. From time to time people at university and at work correct my tiny mistakes, and (quite rarely,) horrible attempts to be like native speaker, and create my own words in essays. I wonder where can I find writing courses for native speakers (or everyone).

What`s your opinion? Is it worthy?
Do you know courses of that kind?
Is it possible to teach someone creative writing, or at least to think like a native speaker?