Animation transition

I’m trying to make my character move like a video below, but I do not know how to do it very well in the State machine. I already have the necessary animations. Good to be clearer, I wanted to know how I can make the transition from idle to walk and walk to stop and idle, with a transition “almost perfect”, and I already know of these blend space, Type pick the exact keyframe to do the transition animation.

Movie: UE4 - Advanced Locomotion System V2 - Features - YouTube