Miguel's right, you should scoop up a decent 6 x 6 camera second-hand and see where it takes you. Of course there's more expense... developing, scanning and so on, but the results are at another level. I don't know, I wrote that because I'm biased. An old 35 mm camera can also work wonders. There's a gentle and searching feel to this self-portrait. Many of your pictures have real feeling, and that's rare you know.
The light at the top of your head is distracting. Can't decide where to go with a crop though. Choices, choices. And I'd crop out the ash. Keep the width.
Hope that doesn't come off too harsh. Just a first glance impression, which is often wrong... Best, Kes
This is a interesting picture. Square image is much nicer for this kind of pictures. Believe me, taste a 6x6 camera for your portraits... You have the eye and the technique. Regards, m