Try different ones out! If you have the time at least.
Otherwise, I’d personally suggest trying out some of the more active Wayland WMs, such as Hyprland or Niri, and of course, sway which is i3 but for wayland! :)
I suggest Wayland because X11 is being dropped everywhere, so it isn’t too wise to get used to an X11 WM, if you’re going out of your way to learn something new in the first place 🙂🤷♂️