start with i3wm/sway or openbox. openbox is a floating window manager so it should be more familiar and i3wm is a tiling window manager. personally i use kde nowadays but i always preferred tiling window managers when i chose to use one. it all comes down to your choices so first see if you prefer tiling or floating window managers and then go from there
i used them all, i didn't notice much difference. but openrc has the coolest bootup screen by far