Don’t assume that it’s carpal tunnel syndrome or that you know best to mitigate it. See a doctor. My finger tingling turned out to be a pinched nerve in the neck (cervical radiculopathy), and the optimal postural adjustments to deal with it are only tangentially related to choice of keyboard. In a perverse way, it may be best to have a godawful keyboard experience that gives me an incentive to get up and walk away from the desk now and then.

One unexpected discovery for me was that my presbyopia had been getting worse, which led me to unconsciously compensate by holding my head in awkward positions, so getting a proper pair of computer glasses helped. That’s probably not your issue, but I mention it to illustrate that it’s difficult to predict what your issue will be.

That said, I have been happy to use neck problems as an excuse to spend enormous amounts of time and money on my keyboard hobby, and I don’t intend to stop.