Here’s my advice on doing walk cycles (or anything really)
Step1: Learn the basics (like in the link you provided) of a “vanilla” walk cycle. Like for example, you usually wanna start with a 12 frame walk cycle, you wanna know about offsetting the hips and shoulders, contact pose, passing pose, etc.
Step2: Practice copying what other successful animators are doing! Find a walk or run cycle in an animated movie or show that you like and get it in to Blender video sequence editor and scrub back and forth and see what’s going on, then try to emulate it as closely as you can. Count how many frames it takes, check where the poses lie etc, etc. You’ll learn a lot, trust me! It’s okay to copy what the pros are doing as long as you’re doing it for your own education and practice.
Just my two cents, hope it helps!