Easy way to memorise pokemon type matchups?

We made it a game in the car, I'd say a type and my kid had to name what it beats. After a week or so fairy, steel and ghost stuck. Also, Scarlet shows you whether a move is effective on the battle screen once you've seen that Pokémon before, so use that while you learn.

Don't memorise the chart, learn the reasons. Water puts out fire, fire burns grass, grass drinks water. Electric fries water and flying, but ground soaks it up. Ice freezes dragons, flying and grass. Fighting punches normal, rock, steel and ice, but can't touch ghost. Once most of them make sense like that, only a handful of weird ones are left (bug beating dark and psychic, ghost being immune to normal) and those stick after you lose to them a couple of times.