JustBrian7872
I think https://github.com/KMKfw/kmk_firmware might be what you are looking for: It exposes itself as flash drive in bootloader-mode and the files on there are just regular Python scripts. If you search for “KMK macro pad”, you’ll find a bunch of projects - most of them diy. If you want to start from scratch, Jan Lunge created an awesome tool for setup and keymap adjustments (video https://www.youtube.com/watch?v=RtYJYFMWjNM, repo https://github.com/JanLunge/pog) - with the idea being that after setup you do not need the tool anymore to adjust the keymap.
Nice! I started using helix before vim and often I find the helix bindings more logical (like shift for the reverse action e.g. u for undo and U for redo). However often the vim bindings feel quicker (c-i-w vs m-i-w-c). Will definitely give it a go!
The fulcrum comes to mind: It has a 5-way joystick (up, down, left, right and push) for the thumbs. You can always add tenting if you want (some alternatives)
You also can check some of the split kb databases if someone created something similar.
Also, https://whynoipv6.com/