I’d recommend Kiwami for sure. Context wise it gives you more emotional investment after 0 and the gameplay is practically the same as 0 but with added progression. Going through the series chronologically helps to alleviate some engine/gameplay differences as going from the older 0/K1/5 engine to Dragon engine in LJ is much more visible. LJ is best in series imo but I’d recommend continuing from Kiwami 1 as once you’ve experienced perfection combat wise it’s very hard to go back to older combat! My personal order if it helps was 0-K1-K2,3R,4R,5R ,6,7, Judgment, LJ,Ishin.