I wouldn't bother, just learn the analogue way (is it even learning?) you tilt your eyes slightly now and then to see the speed. Honestly as you learn to drive you'll find you're able to judge the speed when you're used to the car, same way you learn to change gear by hearing the revs.
If you can't learn to drive with an analogue speedo (everyone else has). Then i doubt you'll be able to put a dash replacement in the car