Since I am not a touch typist, even after 30 years in front of a keyboard, the
ergonomic keyboards I have tried are more nuisance than convenience for me. You should really go to a Best Buy or other computer store and put your hands on one before you decide to invest in one.
Now
here is a truly different keyboard for "lefties" that actually has tilted keys. Something like this you would probably find hard to try-before-you-buy because I doubt many places would have them. That definitely looks like it would have a "different" feel, plus learning the number pad on the left, and the odd formation of Ins/Del/arrow keys - this keyboard comes with a major learning curve!
Or how about some of these
weird keyboards