The theory can be absorbed quite easily and quickly. Putting what one's learned into practice at the keyboard is much slower. Actually, that's the really interesting part. It's not unlike language learning in many ways, inasmuch as it will take as long as it takes: either you play the wee piece with all the right notes at the right tempo, or you don't. No amount of timetabling or box-ticking or money or bullshit can make an iota of difference. No one else but you can do it.