Do you have adaptive brightness enabled? For the longest time I did not realize that the screen doesn't achieve max brightness despite the brightness slider manually set to the max unless it's enabled.
My previous monitor, even at minimum brightness with flux enabled, was still uncomfortable to view at night. I finally invested in a monitor with low minimum brightness (~0.5 nits) and couldn't be happier.
Now that would be fun! I think it would be possible to achieve a reasonable typing speed given the right "keyboard layout" (aka the QWERTY equivalent for musical keyboards).