Learn Creative Writing with Free Lessons & Tips

Yes and no.

There are certain aspects which can be brought attention to, the structure can be worked upon and it can bring a lot of impact into one's writing.

What is not in a trainers hand is a person's imagination power, vocabulary, reading habit etc. A trainer can certainly ask you to do that. But you alone can develop certain aspects after instruction.

If you feel confident about your writing then you need not.

If you have anything already written the maybe you can get a feedback from family or friends. See if they like it. 

If you are writing creative pieces for your education, see if you are getting good marks.

If your basic needs are satisfied, you can decide whether you want to learn further or if the current level is okay. If it is then you need not take a class.

So basically, it all boils down to your need and your personal learning wishes.