If you’re technically inclined (and a hobbyist tinkerer), you could invest in a 3D printer and get to playing with tweak-able keyboards like the Dactyl Manuform

If you’re technically inclined (and a hobbyist tinkerer), you could invest in a 3D printer and get to playing with tweak-able keyboards like the Dactyl Manuform. There’s a whole world of 3D printable ergo that lets you adjust columns, thumbs, etc. such that it perfectly matches your hands. I haven’t dabbled personally, but I think a capable printer can be had for your mentioned $300.00 albeit a lot of labor is required to see a keyboard to fruition.