m1 pro
Get a mechanical keyboard and put it on top of it.
That's the only way I'd ever daily a mac. I did the same thing but with a portable lenovo keyboard with track point on an XPS 15.
The alternative is you can get can plug in a second keyboard, use your right hand on the laptop keyboard and left and and the external keyboard. This will improve your posture. You'll just have to "dude trust me" that it's based.
@karolat yeah i get you, on all the mices i use the first button to go is the middle one because i use it a lot