What other distros than Alpine uses doas by default?

Your fetch shows 0 M / 0 M of memory :)

Why everybody creates their own project instead of joining the current ones? Bus factor is a good measure in any small project.

Because OP can’t afford ram and SerenityOS requires none.

The best configuration out of it is represented in Manjaro Sway. Try itnin Live mode. Format your usb stick with Ventoy2Disk and it’ll be the last time you’ll ever format it.

Try Sway as a Wayland WM.