Ah. I see what you're going for.
Originally I assumed it was a top-down perspective based on the slight above/in-front camera on the head. Both of our points still stand however. Even with a slightly front view of a side walk, your character will still follow the same steps in the walk cycle cauli pointed out above with his reference image, albeit a bit less exaggerated with a less animated, more realistic, character. Regardless of the style, however, animation still requires you to understand the basic tenets of motion such as gravity, and in some cases still exaggerate them -- including in a "realistic" portrayal of someone performing an action -- because it won't read well otherwise.
We're artists/animators, not photographers/videographers after all. So silhouette is very important for our drawings to read well -- and that goes double for an orthographic view! You still need to be sure the front and back legs are distinguishable in silhouette form. There are multiple frames where the pixels on the hips, thighs, and butt are identical and stationary between frames. At least shift them around a pixel or two between frames to indicate subtle motion in the hip and thigh areas. In addition, you could make the shirt wrinkle slightly as the arm moves to indicate further motion.
The key to animation is *change*. The more *change* you add, the more life you give your animation -- even if that change is only a pixel or two shifting around or shifting its value here and there.
