These walking-bass patterns will equip you with the necessary skills to walk bass when playing Jazz, Blues, Rock, Gospel, etc. You’ll no longer need to rely on a bass player.
With this course, you’ll not only learn 48 different walking-bass patterns over four popular chord progressions, but you’ll also develop robust left-hand techniques that are necessary for creating left-hand improvised lines.
While practicing scales also helps in strengthing the left hand, I find learning walking-bass patterns is a lot more fun and creative way of achieving both technique and musicality.
https://pianolessonwithwarren.com/downloads/the-walking-bass-practice-regimen/