I have recently signed up to the Society of Visual Storytelling. I found the site after viewing illustrator Will Terry's videos on YouTube. I can't recommend it enough. Drawing and painting are teachable skills, talent's got nothing to do with it up to a point.
Unfortunately, I'm based in the Middle East and my internet connection is positively third world so I can't watch the videos on subscription - I have to buy them outright and download them. The content of the site, however, is first rate. I highly recommend it.
On the left is a self-portrait from a while back and on the right is the self-portrait I did after viewing Dave Malan's portrait course on SVS a couple of months ago. As you can see, there's a massive improvement, although the measuring of my face at the forehead is not quite correct.