Here are some of my first walking replays

I watched 'walkin', and from what I see, you fall over too quickly. My advice: use more hold. Go to frame 889, press E and hold your left hip and knee, and see what happens :>

Ok i did what you said how is this

Try to always keep atleast 1 foot in contact with the ground. And take it slow. Think of walking as a slow version of running. Focus on balance and getting 1 foot in front of the other. I edited you're replay and did a simple walk. Notice how I didn't make to many quick movements. It gives it a more realistic feel.