This is a good start as a first figure, it really is. So don't take the following negatively.
Skin tone: it looks like you used a commercial flesh. I haven't found one that looks right. I start with beige red from Vallejo then add their game color dark fleshtone for shadows, add one or two of several light skin shades for highligts and finish with pale flesh for the top highlight.
Eyes: pretty good, but don't use white for the whites; it's too stark. I use the same pale flesh i use for my final highlight.
The vest: you've got a bunch of buckles and straps that call for shading, highlighting and, for the buckles, painting in a color differnt from the vest.
Unifirm: same advice as above for highlights and shadows around thwe pockets and seams.
Boots (black): start with a dark gray, use full black only for the deepest shadows, add flesh or light blue for warmer or cooler highlights.
Washes: the only place I'd have used a wash on this figure is in the hair.
Paint: If you're going to jump into the dark art of figures, I'd suggest investing in Vallejo acrylics. They are formulated for brush painting. Vallejo recommends distilled water for thinning, not an expensive proprietary thinner. By following their tutorial at their website, it will show you how to thin and layer your paint to get good transitions between shadow and highlight. It seems like a pricy product at first, but it lasts forever. I have some that's about ten years old and still works fine. The fact that it's thinned for use expands the volume of the bottle significantly.
Finally, photography: use a couple light sources to reduce shadows. If you can adjust your camera manually, try reducing the exposure and if you have the option, make sure your spot metering is on.