There’s a ton of scripts out there. I get that it can be a bit overwhelming starting out. Vanilla WK is pretty good also. But there are a couple of scripts that are incredibly helpful and really improves how you learn.
My favorites are
@prouleau’s Item Inspector script to cover all your reviewing needs outside of the WK SRS.
@rosshendry’s Shin WaniKani Leech Trainer Link to Greasy Fork Shin WaniKani Leech Trainer Get them leeches before they get you!
@Sinyaven’s WaniKani Later Crabigator script.
What do you want now? (Request extensions here) - #792 by Sinyaven postpones any item to the end of the queue, so that when you’re uncertain about an item, you can quickly move on to the next item instead.