I decided to try a more conventional self-portrait in my house rather than on it. This is what my face sometimes looks like on a Saturday evening and, yes, that's red wine. :^)
My flashgun is not very compatible with my camera, so I needed a workaround to achieve this lighting. I used a long enough exposure to allow me to fire my flashgun off to the side (using its test button) during the exposure into a large piece of white card to use as a reflector/diffuser. I had to reach across my body with my left hand to press the shutter release button on the long remote cord and then press the flashgun test button less than 0.6 seconds later.