My final result. I didn’t export it to Unity, however. I prefered to focus on rigging and making walk cycle on my own.
I decided to make a female orc instead. Besides, I spent some time going deeper into rigging before animating the walk cycle (I even read the corresponding section of Blender manual to find out more about it, ha ha ha). I also spent about two or three weeks learning the basics of anatomy during my free time.