The first Kingdom Come: Deliverance was a great game and I think it should be played first, but I understand it's old clunky and unoptimized. These days it should be played with certain QoL mods like unlimited saving, instant herb picking (no animation), richer merchants, and trough washing deluxe/clean Henry (honestly I don't want to spend all my time going to the baths or looking shite). There are others, probably about 7-8 total, that I recommend but you get the idea.