Beautiful picture! :love :love
If you wanted to retake the picture to get the lightening better, take the picture outside with a solid (no mix of sun and shadows) natural light. The lightening in your picture shouldn't affect in judging, so if you're worried about that, you're good. :)
Oh. I'm not quite sure what would help with that. I suggest scanning like @azurbanclucker suggested. Unfortunately, I've never been able to figure out the scanner on my printer, so you'll have to ask him how to do it.