Need your opinion about underpainting

[Karin Wells]

For an underpainting to be successful, you must clearly delineate light from shadow.

Unfortunately your resource photo does not show this at all. You must get another picture of your subject photographed with a single source of light. How light and shadow meet will determine form. If you cannot see form, you cannot successfully paint it.

I suggest that you review the photo resource section of this Forum for some more information about photography.

Considering the poor material you had to work with, I think that you did a rather nice job...don't give up!