First minis?
Well done. I've seen much worse, and from people that have been painting a while.
The comments on the painting are spot on, so I'll talk about photography:
Bend (not fold) a sheet of white printer paper behind your minis, and get two (preferably white) light sources. Make a "V" with the beams, and put the mini at the tip. It will help with the discoloration of the photos, and make the minis "pop" a bit more.
(Alternatively, you could blow about $50 on one of those portable eBay-style studios. They're a bit more professional, but not exactly cheap.)