What about a semi transparent terminal window? When I started out learning linux command line interfaces, it helped having the docs just behind my shell session for reference when all I had was a tiny old laptop. But now I don’t bother ricing up my DE anymore. I just want some default window tilling keybindings that work out of the box, and I’m good to go.
Have you tried multiple virtual desktops, or do you prefer to have a single alt-tab stack of windows? I love using a 3x3 grid of desktops, as the special zoning helps me to organize, separate, and spread out my multiple work tasks.