Untutored, there is a difference between having one quick step before the slide and running to the line. Your cadence should be in a four step approach, step, step, quick half step, slide.
Timing should be step and start the ball, step the ball is slightly behind you, quick step at the top of the back swing, slide foot comes to a stop just before the ball gets to the right knee. You can watch any probowler and they all have this same cadence and timing. Your footwork should be a normal walking pace no matter how many steps you take, but walking with a purpose, not a lazy stroll, with a quick half step then the slide.