This is my custom interface.txt file with all keybinds moved to the left hand (except for Soaper's workshop because it's bugged).

I don't have a write up of the keybinds so for now you will have to hover over the buttons to learn the keys, or browse the keybind menu. Sorry.

An important note is that E and C no longer control camera z-level travel. This keybind set is designed to work in tandem with the mouse, not to exclude the mouse, so scroll wheel is intended to change the z-level. Furthermore, very few keybinds come from pre-v50 Dwarf Fortress. This keymap does not aim to bring back anything of the old.