How did you get so good at playing on the keyboard really fast? Was it just practice and experience, or are there playing exercises you did?
of all the things you can do or try on the keyboard, i've noticed that there is 1 thing that gives you a 10x speed and accuracy boost. and it's this: actually playing what you mean, in that moment. There are many ways this can or can't occur, depending on the situation, whether you are improvising or not improvising, but, again, the 1 defining thing that gives you the biggest speed, accuracy, quality, and everything boost is whether or not you happen to mean what you're saying in that moment. also the same is true with acting