Honestly, and I'm not sure if it's something you'd want to hear, but I don't recommend anyone force artistic expression if it isn't innate.
I'm a firm believer in "if you weren't born with it, it's not for you".
You can learn how to program or fix a car, but learning the technical aspects and rules of photography(for example) doesn't make for a good photographer if you aren't artistically talented innately.
However with that said, there are/were many popular contemporary artists who had zero talent but were able to be successful in their artistic fields due to well thought out expression rather than artistic talent.