I'd probably start by learning how to shoot a jig under a dock. Docks are sometimes Crappie magnets, and they're easy visual targets. Doing it from a yak just means you can shoot the jig from a much lower trajectory, & approach the dock with more stealth (no motor noise, prop wash, large boat shadow, etc.) You can also do this technique with medium power spinning rod/reel outfit, which you may already have. A medium power / fast action tip spinning rod of 5-7ft in length should offer you an ideal dock shooting outfit. And you could use that same outfit to cast/retrieve jigs & Road Runner lures around shoreline cover.
I prefer using weedless jigheads & plastics for all my jig casting techniques, primarily because I'm normally casting those jigs into wood cover of various types (downed trees, brushpiles, submerged standing or fallen trees, etc.) and don't want to have to be constantly breaking off & retying. A handful of 1/32oz, 1/24oz, and/or 1/16oz weedless jigheads will get you started & should last a good while. Quality line of 4-6lb test should be a major factor, along with a good quality spinning reel that balances well with your spinning rod.
You can also check out the yak setups of other members and join in the discussions going on at : https://www.crappie.com/crappie/kaya...ll-watercraft/ .... and you're also likely to get a lot of good info on the NC state forum & the Beginners n Mentoring forum (to go along with whatever info you get here on the Main Message forum).
And when you are around stationary docks, bridge pillars, standing/fallen timber & the like ... you might want to try this technique : Crappie Pappy Article