This is the first sketch of a horse I have probably ever completed, I usually get about half way through the drawing before giving up!
Anyway so I am probably not the best person to help you draw a horse, but the important thing is the getting the outline and muscles on the horse right, and these can make the horse look odd if you get them wrong. I’m not someone to talk as I was not able to get this right! When you add shading to the horses body don’t over work it! Otherwise all you will be doing is coloring the horse in and the contours of the body will not be as prominent.