The approach
Start with the right question.
Start with a consistent hook, weight and body, then change one material or profile at a time.
In practice
Make it useful on the water.
Label your patterns so a productive jig can be recreated instead of remembered vaguely.
Keep learning
Connect the dots.
Use this guide as a starting point, then compare it with the water you're fishing, the tackle you're using, and your own observations. Good fishing knowledge grows through real practice.