[dhagz]

...just get a split keyboard (the Kinesis isn't a true split - still one body). It's cheaper. You don't have extraneous keys. You don't have to worry about using software to get your computer to play nice with two keyboards. I like the offerings from https://gboards.ca, personally (bonus, they're ortholinear if you believe that is good for reducing pain).

I got the Gergoplex from that site, and over the course of a week of typing I got used to it and was able to be productive with it.

Just get a split.

[colordrops]

As people mentioned elsewhere in this thread, kinesis does have split keyboards (the freestyle / edge line). And you can choose your switch type in case you want a quiet keyboard.