macOS is my favourite operating system. Finder in column view with arrow keys to navigate, combined with space for file preview, is incredibly fast and intuitive. Trackpad integration also results in less hand movement. I'm building a Linux (Bazzite) desktop, though, and I've set my sights on the stars.
nnn looks to be an incredible file manager, and was a great recommendation. It looks even more capable than Finder, albeit without scrolling/zooming previews, thanks to macOS having unmatched trackpad functionality. Not to mention Spotlight, which makes opening apps trivial--especially with Alfred available as well. I want to go beyond mere file management, though.
File managenent, browsing, gaming, everything. Just how much can you configure a Linux system to eliminate mouse usage? Shortcut guides welcome (I already know the major ones). I also have a keen interest in tiling window managers, but I've not delved that deep yet. I don't know how to set one up.
Guess I'm forced to learn Emacs/Vim/similar.
KDE has a huge amount amount of configurable keyboard shortcuts, even many that are not assigned by default. Check out the keyboard shortcuts settings in each app, and in KDE Plasma Settings app.
For moving selected files in Dolphin (and any other file browser) I've always just used Ctrl+X Ctrl+V.
(Btw sounds like you're talking about the "context menu" button, and it's my personal pet peeve that this button is missing from many modern keyboards and laptops. On older Windows you used to be able to do Shift+F10 to get the context menu , but that doesn't work anymore so my main use for the mouse is right-clicking..)