There's a great MacOS app (AltTab) that replicates Windows' alt+tab window switching. It's fantastic, I highly recommend if you are as a big keyboard window switcher as you sound.
I just found contexts and it's fantastic, it's just like alt tab but also comes with a spotlight esq quick switcher and supports vim jk by default. It's also really useful for switching between desktops by turning "reduce motion" on.
https://contexts.co/