WM/DE recommendation request: able to have i3-like control, but friendly enough for an ex-windows user

I've been using i3wm for long enough that i now can't go back to a user interface that requires me to use a mouse to get stuff done. However, I'm setting up an old laptop that will be used by both me and my SO for mainly media purposes, but also as my general-use computer for basic tasks. He has been using windows since forever, and has no interest in learning all my keyboard combos.

I'm looking for a WM that supports tiling and keyboard control to do all the things, while still having the mouse-centric control options he's used to: something akin to a "start" button where he can get to the applications, a "close" button on the windows themselves, and the ability to rearrange windows with the mouse.

I'm also not interested in having to logout/login just to use a different WM, as i imagine us going back and forth on who is in control of the computer relatively frequently. I know PopOS has tiling support, but my muscle memory is strong, and I found it cumbersome to redefine all the bindings in a GUI to get it more "i3-like", so having keyboard bindings in a config file would be a huge plus for me.

This magical WM may not exist. I may just have to deal with needing a mouse to use this laptop or having two WMs installed. But I figured it was worth asking y'all for recommendations. Thanks!