I did more or less the same thing over 20 years ago. Wrote a flashcard program for this purpose as well as for vocabulary. It was very helpful to me as well as many who used it. Some even paid me the $10 for the full version. Had to mail out a floppy disk in those days. One drawback is that the software doesn't help with the writing aspect, since writing them down is very helpful for retention. Anyway don't listen to the naysayers and がんばってください.