It took me about a week
My wife actually trained me on stick when I was 30 (God bless her) - Learned on a 5-Speed Mazda MX-3, which had a nice, smootch clutch and nice short throws on the shifter.
The R is our 3rd car with a Manual, and both my wife and I have found it to be one of the more difficult set-ups to adjust to. In particular, the clutch is non-linear (requires a lot of pedal force at first, and when you release it, it eases-out at first, and then the force gets stronger the farther you let it out). The 6-Speed "Space Ball" seems a bit stiff - but maybe there is some excess "play" in the travel. I noticed that my motor mount inserts (the rubber part) are cracked, this may make things move-around a bit, relative to the shift console.
As for learning, I found that it helped me to visualize (in simplified form) what is going-on inside the clutch mechanism. Picture two discs that can "rub" together:
-One connected to the Crank Shaft (Output) of your Engine
-One connected to the Input Shaft of your Transmission
-The Clutch Pedal controls the pressure between them
At a Stop, the disc connected to the Engine is spinning, while the other one is not moving.
When you want to start moving, you do not want to "slam" the two discs together - it will introduce a "shock" into the drivetrain.
If you let the pressure between them increase smoothly and gradually, they PURPOSELY "slip", until they both spin together at the same speed
When you shift, the discs/plates again are not at the same speed, and need to "slip" until the revs match, but the difference is not as pronounced. (It is usually easier to achieve smooth shifts between gears than when starting from a dead stop.)
With the Mazda, you could get clutch-packs that had weights built-in, where the centripetal force aided in clutch release and engagement - anybody know if similar is available for the "R"?
I'm certain that if I can get the hang of this, you can too (I'm an uncoordinated klutz)!
Hope this helps