Cool! Looks like you have explored a lot of how to rig and animate in Spine. Your walk animation needs a bit of work to feel natural, but you'll get there if you keep at it!
We have a video series about animation theory, though it's still on the basics and doesn't yet have a video on animating a walk cycle. Still, I recommend checking out the videos and going through the exercises in each video. You won't learn nearly as much if you just watch them without doing the exercises yourself.
Until we have a walk cycle video in the Animating with Spine video series, check out this video which explains the various parts of the walk cycle.
