Al pretty much summed up the method...but you do need a selection of baits...different sizes, colors, and actions. Pay attention to how your bait is running...how deep, how wide is the action, how it responds when you apply different twitches, how it comes to rest on the pause, does it suspend, slow sink, or slow float. Does it sit horizontally, nose down, or nose up.,,,how does it sound...loud rattles, soft rattles, no rattles...All of those things can make a difference at times. Toss some suspend dots, extra hooks, split rings, and a spool of lead wire in your jerkbait box in case you need to tune one up.
Most of the low priced baits need new hooks and a tune up before they run right so they really aren't good baits to learn with. The pointer 78 (3"), pointer dd78, pointer 100 (4") and a Spro McStick (4.5") in minnow colors would be good starter baits. See what they do then expand your selection from there. In a couple years you will be fluent in Japanese and flat broke from buying jerkbaits. Enjoy the ride!